subject:"Re\: Documentation\/tutorial on using dates in Jena rules with GenericRuleReasoner"

Re: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

2019-06-03 Thread Dave Reynolds


On 03/06/2019 16:36, Pierre Grenon wrote:

So can I just edit

\jena-core\src\main\java\org\apache\jena\reasoner\rulesys\ BuiltinRegistry.java

?

Or is that too hackish?


Definitely too hackish.

After some google searching it I see some old mentions that fuseki 
loadClass will call any public static void init() method on the class 
you load. If that's still true then you should be able to put the


BuiltinRegistry.theRegistry.register(...)

call(s) in such an init method.

Dave


Thanks ,
Pierre

THIS E-MAIL MAY CONTAIN CONFIDENTIAL AND/OR PRIVILEGED INFORMATION.
IF YOU ARE NOT THE INTENDED RECIPIENT (OR HAVE RECEIVED THIS E-MAIL
IN ERROR) PLEASE NOTIFY THE SENDER IMMEDIATELY AND DESTROY THIS
E-MAIL. ANY UNAUTHORISED COPYING, DISCLOSURE OR DISTRIBUTION OF THE
MATERIAL IN THIS E-MAIL IS STRICTLY FORBIDDEN.

IN ACCORDANCE WITH MIFID II RULES ON INDUCEMENTS, THE FIRM'S EMPLOYEES
MAY ATTEND CORPORATE ACCESS EVENTS (DEFINED IN THE FCA HANDBOOK AS
"THE SERVICE OF ARRANGING OR BRINGING ABOUT CONTACT BETWEEN AN INVESTMENT
MANAGER AND AN ISSUER OR POTENTIAL ISSUER"). DURING SUCH MEETINGS, THE
FIRM'S EMPLOYEES MAY ON NO ACCOUNT BE IN RECEIPT OF INSIDE INFORMATION
(AS DESCRIBED IN ARTICLE 7 OF THE MARKET ABUSE REGULATION (EU) NO 596/2014).
(https://www.handbook.fca.org.uk/handbook/glossary/G3532m.html)
COMPANIES WHO DISCLOSE INSIDE INFORMATION ARE IN BREACH OF REGULATION
AND MUST IMMEDIATELY AND CLEARLY NOTIFY ALL ATTENDEES. FOR INFORMATION
ON THE FIRM'S POLICY IN RELATION TO ITS PARTICIPATION IN MARKET SOUNDINGS,
PLEASE SEE https://www.horizon-asset.co.uk/market-soundings/.

HORIZON ASSET LLP IS AUTHORISED AND REGULATED
BY THE FINANCIAL CONDUCT AUTHORITY.


From: Dave Reynolds [mailto:dave.e.reyno...@gmail.com]
Sent: 03 June 2019 11:17
To: users@jena.apache.org
Subject: Re: Documentation/tutorial on using dates in Jena rules with 
GenericRuleReasoner

Hi Pierre,

I'm afraid I've lost track of what you are tying to do. Originally it
seemed to be a problem running comparisons on date time values but
Lorenz has already answered that.

In terms on writing your own new Builtins, then before you can use a new
rule Builtin it needs to be registered. That's what the line:

BuiltinRegistry.theRegistry.register( new StringEqualIgnoreCase() )

was doing in my (non-fuseki) example.

If you need your new builtin to run within fuseki then you would need
some way to trigger such registration code. No doubt that's possible but
not something I've any first hand knowledge of.

By the way, for simply getting code loaded into fuseki you don't need to
repack the jar. Just add your new jar to the classpath and use the
ja:loadClass function to get your class loaded when fuseki starts up.
See last example in:

https://jena.apache.org/documentation/fuseki2/fuseki-configuration.html

Dave

On 03/06/2019 07:01, Pierre Grenon wrote:

Hi Dave,

Executive summary:

I'm not a java coder. I did what I could to try to do this using fuseki.

I get this:
[2019-05-31 18:47:30] Functor WARN Invoking undefined functor testBuilt in r1

I understand this may be related to RuleContext. I don't understand any further.
Details below.

With many thanks,
Pierre

Details ---

1. I unzipped my fuseki-server.jar

2. I placed the code below into a ..\rulesys\testBuilt.java as


package org.apache.jena.reasoner.rulesys.builtins;


import org.apache.jena.graph.* ;
import org.apache.jena.reasoner.rulesys.* ;

/**
* Tests if the first argument is less than the second.
*/

class testBuilt extends BaseBuiltin implements Builtin {
public String getName() {
return "testBuilt";
}

@Override
public int getArgLength() {
return 2;
}

@Override
public boolean bodyCall(Node[] args, int length, RuleContext context) {
checkArgs(length, context);
Node n1 = getArg(0, args, context);
Node n2 = getArg(1, args, context);
if (n1.isLiteral() && n1.isLiteral()) {
return n1.getLiteralLexicalForm().equalsIgnoreCase(
n2.getLiteralLexicalForm() );
} else {
return false;
}
}
}



3. Compiled that:

C:\dev\apache-jena-fuseki-3.10.0\woot>javac 
org\apache\jena\reasoner\rulesys\builtins\testBuilt.java

4. Jar-ed the whole thing back

C:\dev\apache-jena-fuseki-3.10.0\woot>jar cmvf 
fuseki-server\META-INF\MANIFEST.MF fuseki-server.jar -C fuseki-server/ .

5. Replaced my fuseki-server.jar

6. Created a rule file


@prefix ns:  .
@prefix xsd:  .
@prefix rdfs:  .

[r1:
(?x ns:p ?pl)
(?x ns:q ?ql)
testBuilt(?pl, ?ql)
->
(?x ns:r 'equal')
]


7. Created a dataset file


@prefix ns:  .
@prefix owl:  .
@prefix rdf:  .
@prefix xml:  .
@prefix xsd:  .
@prefix rdfs:  .

 ns:p "PenguiN" .
 ns:q "penguin" .
 ns:p "penguin" .

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

2019-06-03 Thread Pierre Grenon

So can I just edit 

\jena-core\src\main\java\org\apache\jena\reasoner\rulesys\ BuiltinRegistry.java

?

Or is that too hackish?

Thanks , 
Pierre

THIS E-MAIL MAY CONTAIN CONFIDENTIAL AND/OR PRIVILEGED INFORMATION. 
IF YOU ARE NOT THE INTENDED RECIPIENT (OR HAVE RECEIVED THIS E-MAIL 
IN ERROR) PLEASE NOTIFY THE SENDER IMMEDIATELY AND DESTROY THIS 
E-MAIL. ANY UNAUTHORISED COPYING, DISCLOSURE OR DISTRIBUTION OF THE 
MATERIAL IN THIS E-MAIL IS STRICTLY FORBIDDEN. 

IN ACCORDANCE WITH MIFID II RULES ON INDUCEMENTS, THE FIRM'S EMPLOYEES 
MAY ATTEND CORPORATE ACCESS EVENTS (DEFINED IN THE FCA HANDBOOK AS 
"THE SERVICE OF ARRANGING OR BRINGING ABOUT CONTACT BETWEEN AN INVESTMENT 
MANAGER AND AN ISSUER OR POTENTIAL ISSUER"). DURING SUCH MEETINGS, THE 
FIRM'S EMPLOYEES MAY ON NO ACCOUNT BE IN RECEIPT OF INSIDE INFORMATION 
(AS DESCRIBED IN ARTICLE 7 OF THE MARKET ABUSE REGULATION (EU) NO 596/2014). 
(https://www.handbook.fca.org.uk/handbook/glossary/G3532m.html)
COMPANIES WHO DISCLOSE INSIDE INFORMATION ARE IN BREACH OF REGULATION 
AND MUST IMMEDIATELY AND CLEARLY NOTIFY ALL ATTENDEES. FOR INFORMATION 
ON THE FIRM'S POLICY IN RELATION TO ITS PARTICIPATION IN MARKET SOUNDINGS, 
PLEASE SEE https://www.horizon-asset.co.uk/market-soundings/. 

HORIZON ASSET LLP IS AUTHORISED AND REGULATED 
BY THE FINANCIAL CONDUCT AUTHORITY.

From: Dave Reynolds [mailto:dave.e.reyno...@gmail.com] 
Sent: 03 June 2019 11:17
To: users@jena.apache.org
Subject: Re: Documentation/tutorial on using dates in Jena rules with 
GenericRuleReasoner

Hi Pierre,

I'm afraid I've lost track of what you are tying to do. Originally it 
seemed to be a problem running comparisons on date time values but 
Lorenz has already answered that.

In terms on writing your own new Builtins, then before you can use a new 
rule Builtin it needs to be registered. That's what the line:

BuiltinRegistry.theRegistry.register( new StringEqualIgnoreCase() )

was doing in my (non-fuseki) example.

If you need your new builtin to run within fuseki then you would need 
some way to trigger such registration code. No doubt that's possible but 
not something I've any first hand knowledge of.

By the way, for simply getting code loaded into fuseki you don't need to 
repack the jar. Just add your new jar to the classpath and use the 
ja:loadClass function to get your class loaded when fuseki starts up. 
See last example in:

https://jena.apache.org/documentation/fuseki2/fuseki-configuration.html

Dave

On 03/06/2019 07:01, Pierre Grenon wrote:
> Hi Dave,
> 
> Executive summary:
> 
> I'm not a java coder. I did what I could to try to do this using fuseki.
> 
> I get this:
> [2019-05-31 18:47:30] Functor WARN Invoking undefined functor testBuilt in r1
> 
> I understand this may be related to RuleContext. I don't understand any 
> further.
> Details below.
> 
> With many thanks,
> Pierre
> 
> Details ---
> 
> 1. I unzipped my fuseki-server.jar
> 
> 2. I placed the code below into a ..\rulesys\testBuilt.java as
> 
> 
> package org.apache.jena.reasoner.rulesys.builtins;
> 
> 
> import org.apache.jena.graph.* ;
> import org.apache.jena.reasoner.rulesys.* ;
> 
> /**
> * Tests if the first argument is less than the second.
> */
> 
> class testBuilt extends BaseBuiltin implements Builtin {
> public String getName() {
> return "testBuilt";
> }
> 
> @Override
> public int getArgLength() {
> return 2;
> }
> 
> @Override
> public boolean bodyCall(Node[] args, int length, RuleContext context) {
> checkArgs(length, context);
> Node n1 = getArg(0, args, context);
> Node n2 = getArg(1, args, context);
> if (n1.isLiteral() && n1.isLiteral()) {
> return n1.getLiteralLexicalForm().equalsIgnoreCase(
> n2.getLiteralLexicalForm() );
> } else {
> return false;
> }
> }
> }
> 
>  
> 
> 3. Compiled that:
> 
> C:\dev\apache-jena-fuseki-3.10.0\woot>javac 
> org\apache\jena\reasoner\rulesys\builtins\testBuilt.java
> 
> 4. Jar-ed the whole thing back
> 
> C:\dev\apache-jena-fuseki-3.10.0\woot>jar cmvf 
> fuseki-server\META-INF\MANIFEST.MF fuseki-server.jar -C fuseki-server/ .
> 
> 5. Replaced my fuseki-server.jar
> 
> 6. Created a rule file
> 
> 
> @prefix ns:  .
> @prefix xsd:  .
> @prefix rdfs:  .
> 
> [r1:
> (?x ns:p ?pl)
> (?x ns:q ?ql)
> testBuilt(?pl, ?ql)
> ->
> (?x ns:r 'equal')
> ]
> 
> 
> 7. Created a dataset file
> 
> 
> @prefix ns:  .
> @prefix owl:  .
> @prefix rdf:  .
> @prefix xml:  .
> @prefix xsd:  .
> @prefix rdfs:  .
> 
>  ns:p "PenguiN" .
>  ns:q "penguin" .
>  ns:p "penguin" .
>  ns:q "penGuin" .
>  ns:p "Penguin" .
>

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

2019-06-03 Thread Pierre Grenon

Thanks, Dave.

 PREAMBLE 

For memory and context -- I am on a quest... it was two-pronged

- Lorenz helped me work out the rule and config using an existing built in. 
That bit is closed.

- I'm pursuing 

"a. Anybody is a taker to hold me by the hand and use this thread to come 
up with a complete cycle for making a new built in and adding it to my fuseki? 
If somebody has the time to do this---and I’m happy that it takes what it 
takes, I can’t on my end make it a high priority--, we could reuse the thread 
for the purpose of a detailed how-to for noobs like me."

I know you said you didn't have time to do this. I've followed this path using 
the old example of a built in you gave. So now my roadmap is: 

- get a custom built in to work in fuseki (on now)
- work out built in with dates (cherry on the cake) 

So I have to figure: 

- How to register new built in in fuseki (but how does fuseki registers them at 
all then?). I thought that if I packed the class in the jar it was enough to 
ensure the registration. I'll start a new thread for this I suppose.

Thank you for the ja:loadClass, I will try this, it should allow making the 
registration . 

Thank you very much, 
Pierre

THIS E-MAIL MAY CONTAIN CONFIDENTIAL AND/OR PRIVILEGED INFORMATION. 
IF YOU ARE NOT THE INTENDED RECIPIENT (OR HAVE RECEIVED THIS E-MAIL 
IN ERROR) PLEASE NOTIFY THE SENDER IMMEDIATELY AND DESTROY THIS 
E-MAIL. ANY UNAUTHORISED COPYING, DISCLOSURE OR DISTRIBUTION OF THE 
MATERIAL IN THIS E-MAIL IS STRICTLY FORBIDDEN. 

IN ACCORDANCE WITH MIFID II RULES ON INDUCEMENTS, THE FIRM'S EMPLOYEES 
MAY ATTEND CORPORATE ACCESS EVENTS (DEFINED IN THE FCA HANDBOOK AS 
"THE SERVICE OF ARRANGING OR BRINGING ABOUT CONTACT BETWEEN AN INVESTMENT 
MANAGER AND AN ISSUER OR POTENTIAL ISSUER"). DURING SUCH MEETINGS, THE 
FIRM'S EMPLOYEES MAY ON NO ACCOUNT BE IN RECEIPT OF INSIDE INFORMATION 
(AS DESCRIBED IN ARTICLE 7 OF THE MARKET ABUSE REGULATION (EU) NO 596/2014). 
(https://www.handbook.fca.org.uk/handbook/glossary/G3532m.html)
COMPANIES WHO DISCLOSE INSIDE INFORMATION ARE IN BREACH OF REGULATION 
AND MUST IMMEDIATELY AND CLEARLY NOTIFY ALL ATTENDEES. FOR INFORMATION 
ON THE FIRM'S POLICY IN RELATION TO ITS PARTICIPATION IN MARKET SOUNDINGS, 
PLEASE SEE https://www.horizon-asset.co.uk/market-soundings/. 

HORIZON ASSET LLP IS AUTHORISED AND REGULATED 
BY THE FINANCIAL CONDUCT AUTHORITY.

From: Dave Reynolds [mailto:dave.e.reyno...@gmail.com] 
Sent: 03 June 2019 11:17
To: users@jena.apache.org
Subject: Re: Documentation/tutorial on using dates in Jena rules with 
GenericRuleReasoner

Hi Pierre,

I'm afraid I've lost track of what you are tying to do. Originally it 
seemed to be a problem running comparisons on date time values but 
Lorenz has already answered that.

In terms on writing your own new Builtins, then before you can use a new 
rule Builtin it needs to be registered. That's what the line:

BuiltinRegistry.theRegistry.register( new StringEqualIgnoreCase() )

was doing in my (non-fuseki) example.

If you need your new builtin to run within fuseki then you would need 
some way to trigger such registration code. No doubt that's possible but 
not something I've any first hand knowledge of.

By the way, for simply getting code loaded into fuseki you don't need to 
repack the jar. Just add your new jar to the classpath and use the 
ja:loadClass function to get your class loaded when fuseki starts up. 
See last example in:

https://jena.apache.org/documentation/fuseki2/fuseki-configuration.html

Dave

On 03/06/2019 07:01, Pierre Grenon wrote:
> Hi Dave,
> 
> Executive summary:
> 
> I'm not a java coder. I did what I could to try to do this using fuseki.
> 
> I get this:
> [2019-05-31 18:47:30] Functor WARN Invoking undefined functor testBuilt in r1
> 
> I understand this may be related to RuleContext. I don't understand any 
> further.
> Details below.
> 
> With many thanks,
> Pierre
> 
> Details ---
> 
> 1. I unzipped my fuseki-server.jar
> 
> 2. I placed the code below into a ..\rulesys\testBuilt.java as
> 
> 
> package org.apache.jena.reasoner.rulesys.builtins;
> 
> 
> import org.apache.jena.graph.* ;
> import org.apache.jena.reasoner.rulesys.* ;
> 
> /**
> * Tests if the first argument is less than the second.
> */
> 
> class testBuilt extends BaseBuiltin implements Builtin {
> public String getName() {
> return "testBuilt";
> }
> 
> @Override
> public int getArgLength() {
> return 2;
> }
> 
> @Override
> public boolean bodyCall(Node[] args, int length, RuleContext context) {
> checkArgs(length, context);
> Node n1 = getArg(0, args, context);
> Node n2 = getArg(1, args, context);
> if (n1.isLiteral() && n1.isLiteral()) {
> return n1.getLiteralLexicalForm().equalsIgnoreCase(
> n2.getLiteralLexicalForm() );
> } else {
> return false;
> }
> }
> }
> 
>  
> 
> 3. Compiled that:
> 
> C:\dev\apache-jena-fuseki-3.10.0\woot>javac 
> org\apache\jena\reasoner\rulesys\builtins\testBuilt.java
> 
> 4. Jar-ed the whole thing back
> 
>

Re: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

2019-06-03 Thread Dave Reynolds


Hi Pierre,

I'm afraid I've lost track of what you are tying to do. Originally it 
seemed to be a problem running comparisons on date time values but 
Lorenz has already answered that.


In terms on writing your own new Builtins, then before you can use a new 
rule Builtin it needs to be registered. That's what the line:


BuiltinRegistry.theRegistry.register( new StringEqualIgnoreCase() )

was doing in my (non-fuseki) example.

If you need your new builtin to run within fuseki then you would need 
some way to trigger such registration code. No doubt that's possible but 
not something I've any first hand knowledge of.


By the way, for simply getting code loaded into fuseki you don't need to 
repack the jar. Just add your new jar to the classpath and use the 
ja:loadClass function to get your class loaded when fuseki starts up. 
See last example in:


https://jena.apache.org/documentation/fuseki2/fuseki-configuration.html

Dave

On 03/06/2019 07:01, Pierre Grenon wrote:

Hi Dave,

Executive summary:

I'm not a java coder. I did what I could to try to do this using fuseki.

I get this:
[2019-05-31 18:47:30] FunctorWARN  Invoking undefined functor testBuilt in 
r1

I understand this may be related to RuleContext. I don't understand any further.
Details below.

With many thanks,
Pierre

Details ---

1. I unzipped my fuseki-server.jar

2. I placed the code below into a ..\rulesys\testBuilt.java as


package org.apache.jena.reasoner.rulesys.builtins;


import org.apache.jena.graph.* ;
import org.apache.jena.reasoner.rulesys.* ;

/**
  * Tests if the first argument is less than the second.
  */

class testBuilt extends BaseBuiltin implements Builtin {
public String getName() {
return "testBuilt";
}

@Override
public int getArgLength() {
return 2;
}

@Override
public boolean bodyCall(Node[] args, int length, 
RuleContext context) {
checkArgs(length, context);
Node n1 = getArg(0, args, context);
Node n2 = getArg(1, args, context);
if (n1.isLiteral() && n1.isLiteral()) {
return 
n1.getLiteralLexicalForm().equalsIgnoreCase(
n2.getLiteralLexicalForm() );
} else {
return false;
}
}
}



3. Compiled that:

C:\dev\apache-jena-fuseki-3.10.0\woot>javac 
org\apache\jena\reasoner\rulesys\builtins\testBuilt.java

4. Jar-ed the whole thing back

C:\dev\apache-jena-fuseki-3.10.0\woot>jar cmvf 
fuseki-server\META-INF\MANIFEST.MF fuseki-server.jar -C fuseki-server/ .

5. Replaced my fuseki-server.jar

6. Created a rule file


@prefix ns:  .
@prefix xsd:  .
@prefix rdfs:  .

[r1:
(?x ns:p ?pl)
(?x ns:q ?ql)
testBuilt(?pl, ?ql)
->
(?x ns:r 'equal')
]


7. Created a dataset file


@prefix ns:  .
@prefix owl:  .
@prefix rdf:  .
@prefix xml:  .
@prefix xsd:  .
@prefix rdfs:  .

 ns:p "PenguiN" .
 ns:q "penguin" .
 ns:p "penguin" .
 ns:q "penGuin" .
 ns:p "Penguin" .
 ns:q "penguin" .
 ns:p "Noot" .
 ns:q "noot" .
 ns:p "NootNoot" .
 ns:q "nootNoot" .




8. Created a config file on the previous model to use the above


@prefix :   .
@prefix rdf:    .
@prefix tdb2:   .
@prefix ja: .
@prefix rdfs:   .
@prefix fuseki:  .

:theServiceBI a   fuseki:Service ;
 rdfs:label"Service with update and query to test 
minimal dataset with custom built-in inference using an instance of generic rule 
reasoner" ;
 fuseki:dataset:theDatasetBI ;
#:tdb_dataset_readwrite ;
 fuseki:name   "ConferenceBuiltIn" ;
 fuseki:serviceQuery   "query" , "sparql" ;

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

2019-06-03 Thread Pierre Grenon

Hi Dave, 

Executive summary: 

I'm not a java coder. I did what I could to try to do this using fuseki. 

I get this: 
[2019-05-31 18:47:30] FunctorWARN  Invoking undefined functor testBuilt in 
r1

I understand this may be related to RuleContext. I don't understand any further.
Details below. 

With many thanks, 
Pierre

Details --- 

1. I unzipped my fuseki-server.jar 

2. I placed the code below into a ..\rulesys\testBuilt.java as 


package org.apache.jena.reasoner.rulesys.builtins;


import org.apache.jena.graph.* ;
import org.apache.jena.reasoner.rulesys.* ;

/**
 * Tests if the first argument is less than the second.
 */

class testBuilt extends BaseBuiltin implements Builtin {
public String getName() {
return "testBuilt";
}

@Override
public int getArgLength() {
return 2;
}

@Override
public boolean bodyCall(Node[] args, int length, 
RuleContext context) {
checkArgs(length, context);
Node n1 = getArg(0, args, context);
Node n2 = getArg(1, args, context);
if (n1.isLiteral() && n1.isLiteral()) {
return 
n1.getLiteralLexicalForm().equalsIgnoreCase( 
n2.getLiteralLexicalForm() );
} else {
return false;
}
}
}

  

3. Compiled that:

C:\dev\apache-jena-fuseki-3.10.0\woot>javac 
org\apache\jena\reasoner\rulesys\builtins\testBuilt.java

4. Jar-ed the whole thing back

C:\dev\apache-jena-fuseki-3.10.0\woot>jar cmvf 
fuseki-server\META-INF\MANIFEST.MF fuseki-server.jar -C fuseki-server/ .

5. Replaced my fuseki-server.jar

6. Created a rule file 

 
@prefix ns:  .
@prefix xsd:  .
@prefix rdfs:  .

[r1: 
(?x ns:p ?pl) 
(?x ns:q ?ql)
testBuilt(?pl, ?ql) 
-> 
(?x ns:r 'equal') 
]


7. Created a dataset file 


@prefix ns:  .
@prefix owl:  .
@prefix rdf:  .
@prefix xml:  .
@prefix xsd:  .
@prefix rdfs:  .

 ns:p "PenguiN" .
 ns:q "penguin" .
 ns:p "penguin" .
 ns:q "penGuin" .
 ns:p "Penguin" .
 ns:q "penguin" .
 ns:p "Noot" .
 ns:q "noot" .
 ns:p "NootNoot" .
 ns:q "nootNoot" .




8. Created a config file on the previous model to use the above


@prefix :   .
@prefix rdf:    .
@prefix tdb2:   .
@prefix ja: .
@prefix rdfs:   .
@prefix fuseki:  .

:theServiceBI a   fuseki:Service ;
rdfs:label"Service with update and query to test 
minimal dataset with custom built-in inference using an instance of generic 
rule reasoner" ;
fuseki:dataset:theDatasetBI ;
#:tdb_dataset_readwrite ;
fuseki:name   "ConferenceBuiltIn" ;
fuseki:serviceQuery   "query" , "sparql" ;
fuseki:serviceReadGraphStore  "get" ;
fuseki:serviceReadWriteGraphStore
"data" ;
fuseki:serviceUpdate  "update" ;
fuseki:serviceUpload  "upload" .

:theDatasetBI a ja:RDFDataset ; 
ja:defaultGraph <#theModel_GRRBI> .

<#theModel_GRRBI> a ja:InfModel ;
ja:baseModel <#theGraphBI> ;
ja:reasoner [
ja:reasonerURL 
 ;
ja:rulesFrom 
 
] ;
.

<#theGraphBI> rdf:type tdb2:GraphTDB ;
   tdb2:dataset :theTDB2DatasetBI .

:theTDB2DatasetBI
a  tdb2:DatasetTDB2 ;
tdb2:location  
"C:\\dev\\apache-jena-fuseki-3.10.0\\run/databases/ConferenceBuiltIn" ;
tdb2:unionDefaultGraph true.



This is my query: 
---

prefix ns: 
select *
where 
{?x ns:r ?z}
limit 5

This is Fuskei's log: 
--

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

2019-05-23 Thread Pierre Grenon

Further to the below. 

I am now pasting a config file in which I use both the Generic Rule Reasoner 
for the rule and RDFS for class subsumption.

THIS E-MAIL MAY CONTAIN CONFIDENTIAL AND/OR PRIVILEGED INFORMATION. 
IF YOU ARE NOT THE INTENDED RECIPIENT (OR HAVE RECEIVED THIS E-MAIL 
IN ERROR) PLEASE NOTIFY THE SENDER IMMEDIATELY AND DESTROY THIS 
E-MAIL. ANY UNAUTHORISED COPYING, DISCLOSURE OR DISTRIBUTION OF THE 
MATERIAL IN THIS E-MAIL IS STRICTLY FORBIDDEN. 

IN ACCORDANCE WITH MIFID II RULES ON INDUCEMENTS, THE FIRM'S EMPLOYEES 
MAY ATTEND CORPORATE ACCESS EVENTS (DEFINED IN THE FCA HANDBOOK AS 
"THE SERVICE OF ARRANGING OR BRINGING ABOUT CONTACT BETWEEN AN INVESTMENT 
MANAGER AND AN ISSUER OR POTENTIAL ISSUER"). DURING SUCH MEETINGS, THE 
FIRM'S EMPLOYEES MAY ON NO ACCOUNT BE IN RECEIPT OF INSIDE INFORMATION 
(AS DESCRIBED IN ARTICLE 7 OF THE MARKET ABUSE REGULATION (EU) NO 596/2014). 
(https://www.handbook.fca.org.uk/handbook/glossary/G3532m.html)
COMPANIES WHO DISCLOSE INSIDE INFORMATION ARE IN BREACH OF REGULATION 
AND MUST IMMEDIATELY AND CLEARLY NOTIFY ALL ATTENDEES. FOR INFORMATION 
ON THE FIRM'S POLICY IN RELATION TO ITS PARTICIPATION IN MARKET SOUNDINGS, 
PLEASE SEE https://www.horizon-asset.co.uk/market-soundings/. 

HORIZON ASSET LLP IS AUTHORISED AND REGULATED 
BY THE FINANCIAL CONDUCT AUTHORITY.


CAVEAT: This may appear trivial yet it was not straightforward to me how this 
works so any comment on this type of config is obviously most welcome 
independently of the dates aspect. 

On my end this concludes this part of the thread. I will use this config and 
the data as an extensible basis to figure out new built ins, although I have no 
clue when that might be -- all current conferences might have their deadlines 
passed by the time I get to this...

With many thanks and kind regards, 
Pierre 

For reference: 

/Conference1 allows deriving the expected facts from the rules but did not 
support RDFS 
/Conference2 allows returning bindings for the following query:
select * where 
{?x a  . ?x  ?e} 


### START CONFIG 2: Conference_GRR_RDFS.ttl ###

@prefix :   .
@prefix rdf:    .
@prefix tdb2:   .
@prefix ja: .
@prefix rdfs:   .
@prefix fuseki:  .

:theService a   fuseki:Service ;
rdfs:label"Service with update and query to test 
minimal dataset with inference using an instance of generic rule reasoner and 
RDFSExptRuleReasoner" ;
fuseki:dataset:theDataset ;
#:tdb_dataset_readwrite ;
fuseki:name   "Conference2" ;
fuseki:serviceQuery   "query" , "sparql" ;
fuseki:serviceReadGraphStore  "get" ;
fuseki:serviceReadWriteGraphStore
"data" ;
fuseki:serviceUpdate  "update" ;
fuseki:serviceUpload  "upload" .

:theDataset a ja:RDFDataset ; 
ja:defaultGraph <#theUnionModel>
.

<#theUnionModel> a ja:UnionModel ;
ja:rootModel <#theRootModel> ;
ja:subModel <#theModel_GRR> , <#theModel_RDFS> .

<#theRootModel> a ja:Model ;
ja:baseModel <#theGraph> ;
.


<#theModel_GRR> a ja:InfModel ;
ja:baseModel <#theGraph> ;
ja:reasoner [
ja:reasonerURL 
 ;
ja:rulesFrom 
 
] ;
.

<#theModel_RDFS> a ja:InfModel ;
ja:baseModel <#theGraph> ;
ja:reasoner [
ja:reasonerURL  
] ;
.

<#theGraph> rdf:type tdb2:GraphTDB ;
   tdb2:dataset :theTDB2Dataset .

:theTDB2Dataset
a  tdb2:DatasetTDB2 ;
tdb2:location  
"C:\\dev\\apache-jena-fuseki-3.10.0\\run/databases/Conference1" ;
tdb2:unionDefaultGraph true.

### END CONFIG 2: Conference_GRR_RDFS.ttl ###   


> -Original Message-
> From: Pierre Grenon
> Sent: 23 May 2019 06:23
> To: 'users@jena.apache.org'
> Subject: RE: Documentation/tutorial on using dates in Jena rules with
> GenericRuleReasoner
> 
> Apologies for repost -- it *feels* like attaching stuff to emails is not the 
> right
> thing to do. So, for all it's worth, as I would find it useful myself, files 
> copied
> below.
> 
> Many thanks,
> Pierre
> 
> 
> 
> - Conference_GRR_onerule.ttl --- fuseki config with TDB2 and generic rule
> reasoner
> ### START CONFIG ###
> 
> @prefix :   .
> @prefix rdf:    .
> @prefix tdb2:   .
> @prefix ja: .
> @prefix rdfs:   .
>

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

2019-05-22 Thread Pierre Grenon

Apologies for repost -- it *feels* like attaching stuff to emails is not the 
right thing to do. So, for all it's worth, as I would find it useful myself, 
files copied below. 

Many thanks, 
Pierre



- Conference_GRR_onerule.ttl --- fuseki config with TDB2 and generic rule 
reasoner
### START CONFIG ###

@prefix :   .
@prefix rdf:    .
@prefix tdb2:   .
@prefix ja: .
@prefix rdfs:   .
@prefix fuseki:  .

:theService a   fuseki:Service ;
rdfs:label"Service with update and query to test 
minimal dataset with inference using an instance of generic rule reasoner" ;
fuseki:dataset:theDataset ;
#:tdb_dataset_readwrite ;
fuseki:name   "Conference1" ;
fuseki:serviceQuery   "query" , "sparql" ;
fuseki:serviceReadGraphStore  "get" ;
fuseki:serviceReadWriteGraphStore
"data" ;
fuseki:serviceUpdate  "update" ;
fuseki:serviceUpload  "upload" .

:theDataset a ja:RDFDataset ; 
ja:defaultGraph <#theModel_GRR> .

<#theModel_GRR> a ja:InfModel ;
ja:baseModel <#theGraph> ;
ja:reasoner [
ja:reasonerURL 
 ;
ja:rulesFrom 
 
] ;
.

<#theGraph> rdf:type tdb2:GraphTDB ;
   tdb2:dataset :theTDB2Dataset .

:theTDB2Dataset
a  tdb2:DatasetTDB2 ;
tdb2:location  
"C:\\dev\\apache-jena-fuseki-3.10.0\\run/databases/Conference1" ;
tdb2:unionDefaultGraph true.

### END CONFIG ###

- conference1.ttl 
### START DATA ###

@prefix :  .
@prefix owl:  .
@prefix rdf:  .
@prefix xml:  .
@prefix xsd:  .
@prefix rdfs:  .

### OE
 rdf:type owl:Class ;
rdfs:label "organised event" .

 rdf:type owl:Class ;
rdfs:subClassOf  ;
rdfs:label "conference" .

 rdf:type owl:Class ; 
rdfs:subClassOf  ;
rdfs:label "workshop" .

 rdf:type owl:DatatypeProperty ;
rdfs:domain  ;
rdfs:range xsd:dateTime ;
rdfs:label "deadline passed" .

 rdf:type owl:Class ; 
rdfs:label "Status" .

 
rdf:type owl:ObjectProperty ;
rdfs:domain  ;
rdfs:range  ;
rdfs:label "has status" .

 
rdf:type owl:NamedIndividual ,  ;
rdfs:label "deadline passed" .

 
rdf:type owl:NamedIndividual ,  ;
rdfs:label "deadline active" .


### KB
 rdf:type owl:NamedIndividual , 
 ;
"2019-01-01T00:00:00Z"^^xsd:dateTime ;
rdfs:label "1st Intl Conf of the Penguin Appreciation Society" .

 rdf:type owl:NamedIndividual , 
 ;
"3019-01-01T00:00:00Z"^^xsd:dateTime ;
rdfs:label "101st Conf of the Penguin Appreciation Society" .

 rdf:type owl:NamedIndividual , 
 ;
"2018-07-01T00:00:00Z"^^xsd:dateTime ;
rdfs:label "How to walk like a penguin" .

 rdf:type owl:NamedIndividual , 
 ;
"2030-07-01T00:00:00Z"^^xsd:dateTime ;
rdfs:label "Do penguins walk?" .

### END DATA ###

- conference1.rules 
### START RULE###
@prefix ns:  .
@prefix xsd:  .
@prefix rdfs:  .

[ruleDeadlinePassed: 
(?ev ns:hasDeadline ?date)
now(?now)
greaterThan(?now, ?date)
-> 
(?ev ns:hasStatus ns:Status_DeadlinePassed)
]
### END RULE ###



From: Pierre Grenon 
Sent: 22 May 2019 17:06
To: 'users@jena.apache.org'
Subject: RE: Documentation/tutorial on using dates in Jena rules with 
GenericRuleReasoner

Hi – yes, it works for me using fuseki as well. Apologies, I think my config 
file was bad or the data somehow. 

For reference, similar to your test: 

-

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

2019-05-22 Thread Pierre Grenon

Thank you, Dave – I am yet to struggle with this. Hope to be in a position to 
follow up

Best
Pierre

THIS E-MAIL MAY CONTAIN CONFIDENTIAL AND/OR PRIVILEGED INFORMATION. 
IF YOU ARE NOT THE INTENDED RECIPIENT (OR HAVE RECEIVED THIS E-MAIL 
IN ERROR) PLEASE NOTIFY THE SENDER IMMEDIATELY AND DESTROY THIS 
E-MAIL. ANY UNAUTHORISED COPYING, DISCLOSURE OR DISTRIBUTION OF THE 
MATERIAL IN THIS E-MAIL IS STRICTLY FORBIDDEN. 

IN ACCORDANCE WITH MIFID II RULES ON INDUCEMENTS, THE FIRM'S EMPLOYEES 
MAY ATTEND CORPORATE ACCESS EVENTS (DEFINED IN THE FCA HANDBOOK AS 
"THE SERVICE OF ARRANGING OR BRINGING ABOUT CONTACT BETWEEN AN INVESTMENT 
MANAGER AND AN ISSUER OR POTENTIAL ISSUER"). DURING SUCH MEETINGS, THE 
FIRM'S EMPLOYEES MAY ON NO ACCOUNT BE IN RECEIPT OF INSIDE INFORMATION 
(AS DESCRIBED IN ARTICLE 7 OF THE MARKET ABUSE REGULATION (EU) NO 596/2014). 
(https://www.handbook.fca.org.uk/handbook/glossary/G3532m.html)
COMPANIES WHO DISCLOSE INSIDE INFORMATION ARE IN BREACH OF REGULATION 
AND MUST IMMEDIATELY AND CLEARLY NOTIFY ALL ATTENDEES. FOR INFORMATION 
ON THE FIRM'S POLICY IN RELATION TO ITS PARTICIPATION IN MARKET SOUNDINGS, 
PLEASE SEE https://www.horizon-asset.co.uk/market-soundings/. 

HORIZON ASSET LLP IS AUTHORISED AND REGULATED 
BY THE FINANCIAL CONDUCT AUTHORITY.

From: Dave Reynolds [mailto:dave.e.reyno...@gmail.com]
Sent: 17 May 2019 09:01
To: users@jena.apache.org
Subject: Re: Documentation/tutorial on using dates in Jena rules with 
GenericRuleReasoner

Hi Pierre,

I can't offer to hold you by the hand I'm afraid, snowed under with
work. But a minimal example might help. Here's an example of a minimal
extension builtin:

class StringEqualIgnoreCase extends BaseBuiltin implements Builtin {

public String getName() {
return "stringEqualIgnoreCase";
}

@Override
public int getArgLength() {
return 2;
}

@Override
public boolean bodyCall(Node[] args, int length, RuleContext context) {
checkArgs(length, context);
Node n1 = getArg(0, args, context);
Node n2 = getArg(1, args, context);
if (n1.isLiteral() && n1.isLiteral()) {
return n1.getLiteralLexicalForm().equalsIgnoreCase(
n2.getLiteralLexicalForm() );
} else {
return false;
}
}

}

and an example driver class for demonstrating it operating:

/**
* Rule test.
*/
public void testRuleSet2() {
String NS = "http://ont.com/";
BuiltinRegistry.theRegistry.register( new
StringEqualIgnoreCase() );
String rules = "[r1: (?x ns:p ?pl) (?x ns:q ?ql)
stringEqualIgnoreCase(?pl, ?ql) -> (?x ns:r 'equal') ]";
Model m = ModelFactory.createDefaultModel();
Resource a = m.createResource(NS + "a");
Resource b = m.createResource(NS + "b");
Property p = m.createProperty(NS + "p");
Property q = m.createProperty(NS + "q");
m.add(a, p, "FOO");
m.add(a, q, "foo");
m.add(b, p, "FOO");
m.add(b, q, "foobar");
GenericRuleReasoner reasoner = new GenericRuleReasoner(Rule
.parseRules(rules));
InfModel infModel = ModelFactory.createInfModel(reasoner, m);
infModel.write(System.out, "Turtle");
}

These are cut/paste from some very ancient examples but hopefully should
work, if not let us know I can see about assembling it into a self
contained working example.

As it says in the documentation, for examples of how to write particular
sorts of builtin then the best place is to look is the source code for
the current builtins.

Dave

On 17/05/2019 07:53, Pierre Grenon wrote:
> Hi
>
> Thanks again.
>
> Hear you.
>
> I think this is becoming a bit too meta perhaps. Maybe there’s a couple of 
> ways to go forward.
>
>
> a. Anybody is a taker to hold me by the hand and use this thread to come up 
> with a complete cycle for making a new built in and adding it to my fuseki? 
> If somebody has the time to do this---and I’m happy that it takes what it 
> takes, I can’t on my end make it a high priority--, we could reuse the thread 
> for the purpose of a detailed how-to for noobs like me.
>
> b. I think I actually tried the rule below and I didn’t get any inference 
> result. Don’t know if it’s my config, my rule or my data. I could start a. by 
> trying to provide a dataset and config file as well. Again, anybody willing 
> to hold my hand?
>
> Give a shout.
>
> Thanks,
> Pierre
>
> From: Lorenz B. [mailto:buehm...@informatik.uni-leipzig.de]
> Sent: 17 May 2019 07:24
> To: users@jena.apache.org
> Subject: Re: Documentation/tutorial on using dates in Jena rules with 
> GenericRuleReasoner
>
> Hi,
>
>> Hi Lorenz,
>>
>> Thank you for your answer.
>>
>> Quick follow up.
>>
>> I think the issue for me is the documentation of the built-ins is too 
>> abstract or relies on understanding the source code. So I suppose, 
>> documentation / tutorial seems somewhat superfluous when you can do that – 
>> only I can’t understand what’s there and the source at the moment.
> I can see that it might be too abstract for people coming from different
> areas, sure. But, the question is who is able to provide such a tutorial
> and also who has the time. It's always a trade-off in Open Source
>

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

2019-05-22 Thread Pierre Grenon

Hi – yes, it works for me using fuseki as well. Apologies, I think my config 
file was bad or the data somehow.

For reference, similar to your test:


-Conference_GRR_onerule.ttl --- fuseki config with TDB2 and generic 
rule reasoner

-conference1.ttl --- small test set, with more than minimal data

-conference1.rules --- single (same) rule

Query: select * where {?x  ?z}


From: Lorenz B. [mailto:buehm...@informatik.uni-leipzig.de]
Sent: 18 May 2019 19:12
To: users@jena.apache.org
Subject: Re: Documentation/tutorial on using dates in Jena rules with 
GenericRuleReasoner


> b. I think I actually tried the rule below and I didn’t get any inference 
> result. Don’t know if it’s my config, my rule or my data. I could start a. by 
> trying to provide a dataset and config file as well. Again, anybody willing 
> to hold my hand?

Works for me as expected:

|Model m = ModelFactory.createDefaultModel();||
||String s = "@prefix ns: > .\n" +||
||   "@prefix xsd: 
> .\n" +||
||   " ns:hasDeadline
\"2002-05-30T09:00:00\"^^xsd:dateTime .";
||m.read(new StringReader(s), null, "Turtle");||
||
||String rule =||
||" [ruleMissedDeadline2: (?conference
> ?date) now(?now) 
greaterThan(?now, ?date)
" +||
||"-> (?conference 
>
>)]";||
||
||List rules = Rule.parseRules(rule);||
||Reasoner reasoner = new GenericRuleReasoner(rules);||
||Model infModel = ModelFactory.createInfModel(reasoner, m);||
||infModel.write(System.out, "N-Triples");|



> Give a shout.
>
> Thanks,
> Pierre
>
> From: Lorenz B. [mailto:buehm...@informatik.uni-leipzig.de]
> Sent: 17 May 2019 07:24
> To: users@jena.apache.org
> Subject: Re: Documentation/tutorial on using dates in Jena rules with 
> GenericRuleReasoner
>
> Hi,
>
>> Hi Lorenz,
>>
>> Thank you for your answer.
>>
>> Quick follow up.
>>
>> I think the issue for me is the documentation of the built-ins is too 
>> abstract or relies on understanding the source code. So I suppose, 
>> documentation / tutorial seems somewhat superfluous when you can do that – 
>> only I can’t understand what’s there and the source at the moment.
> I can see that it might be too abstract for people coming from different
> areas, sure. But, the question is who is able to provide such a tutorial
> and also who has the time. It's always a trade-off in Open Source
> projects like Jena - I guess most of the devs or other project related
> people here are not getting payed, and clearly such a tutorial for most
> if not all of the built-ins definitely needs some effort. Ideally, the
> community could take over those things, but looks like nobody ever wrote
> blog posts or tutorials about the Jena rule system and its built-ins.
>>
>>
>> 1. Yes, I seem to understand difference is a no go but I was wondering if 
>> there might be some work around coercing the dateTime to something else. I’m 
>> not sure I understood that very well but it looks like I can’t use functions 
>> in arguments of built-ins (so no xsd:year(?date) or whatever).
> I don't think you can use functions or expressions from the SPARQL
> engine resp. its XPath constructors. Both are totally different
> implementations I guess - but again, I'm not a developer, so I can't
> make a valid statement, except for looking into the code and the docs.
> From my point of view, only the mentioned built-ins from the docs are
> valid so far.
>>
>>
>> But then, on greaterThan, something should be workable if I have 
>> xsd:dateTime, no?
>>
>> What’s wrong with :
>>
>>
>>
>> [ruleMissedDeadline2:
>>
>> (?conference ns:hasDeadline ?date)
>>
>> now(?now)
>>
>> greaterThan(?now, ?date)
>>
>> ->
>>
>> (?conference ns:status ns:DeadlinePassed)
>>
>> ]
> Well I was clearly thinking too complicated, so yes, your rule should
> work given that the docs say
>
>> lessThan(?x, ?y), greaterThan(?x, ?y)
>> le(?x, ?y), ge(?x, ?y)
>>
>> Test if x is <, >, <= or >= y. Only passes if both x and y are numbers
>> or time instants (can be integer or floating point or XSDDateTime).
> I was more thinking about things like inferring the age of a person
> isn't possible right now, but would clearly be some nice to have feature
> such that you could have it as implicit fact in your KB without the need
> to change the asserted data every year.
>
>> 2. When you say extend the rule system, you mean adding a class using as a 
>> starting point something is in ..rulesys.builtins and adapting it and then 
>> rebuild all the jars. I’m using Fuseki, so I’d have to rebuild that too, 
>> yeah? Aside from the fact I’m not coding in java, this isn’t the easiest 
>> path for me at the moment.
> That's also

Re: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

2019-05-18 Thread Lorenz B.


> b.  I think I actually tried the rule below and I didn’t get any 
> inference result. Don’t know if it’s my config, my rule or my data. I could 
> start a. by trying to provide a dataset and config file as well. Again, 
> anybody willing to hold my hand?

Works for me as expected:

|    Model m = ModelFactory.createDefaultModel();||
||    String s = "@prefix ns:  .\n" +||
||   "@prefix xsd:  .\n" +||
||   " ns:hasDeadline
\"2002-05-30T09:00:00\"^^xsd:dateTime .";
||    m.read(new StringReader(s), null, "Turtle");||
||
||    String rule =||
||    " [ruleMissedDeadline2: (?conference
 ?date) now(?now) greaterThan(?now, ?date)
" +||
||    "-> (?conference 
)]";||
||
||    List rules = Rule.parseRules(rule);||
||    Reasoner reasoner = new GenericRuleReasoner(rules);||
||    Model infModel = ModelFactory.createInfModel(reasoner, m);||
||    infModel.write(System.out, "N-Triples");|



> Give a shout.
>
> Thanks,
> Pierre
>
> From: Lorenz B. [mailto:buehm...@informatik.uni-leipzig.de]
> Sent: 17 May 2019 07:24
> To: users@jena.apache.org
> Subject: Re: Documentation/tutorial on using dates in Jena rules with 
> GenericRuleReasoner
>
> Hi,
>
>> Hi Lorenz,
>>
>> Thank you for your answer.
>>
>> Quick follow up.
>>
>> I think the issue for me is the documentation of the built-ins is too 
>> abstract or relies on understanding the source code. So I suppose, 
>> documentation / tutorial seems somewhat superfluous when you can do that – 
>> only I can’t understand what’s there and the source at the moment.
> I can see that it might be too abstract for people coming from different
> areas, sure. But, the question is who is able to provide such a tutorial
> and also who has the time. It's always a trade-off in Open Source
> projects like Jena - I guess most of the devs or other project related
> people here are not getting payed, and clearly such a tutorial for most
> if not all of the built-ins definitely needs some effort. Ideally, the
> community could take over those things, but looks like nobody ever wrote
> blog posts or tutorials about the Jena rule system and its built-ins.
>>
>>
>> 1. Yes, I seem to understand difference is a no go but I was wondering if 
>> there might be some work around coercing the dateTime to something else. I’m 
>> not sure I understood that very well but it looks like I can’t use functions 
>> in arguments of built-ins (so no xsd:year(?date) or whatever).
> I don't think you can use functions or expressions from the SPARQL
> engine resp. its XPath constructors. Both are totally different
> implementations I guess - but again, I'm not a developer, so I can't
> make a valid statement, except for looking into the code and the docs.
> From my point of view, only the mentioned built-ins from the docs are
> valid so far.
>>
>>
>> But then, on greaterThan, something should be workable if I have 
>> xsd:dateTime, no?
>>
>> What’s wrong with :
>>
>>
>>
>> [ruleMissedDeadline2:
>>
>> (?conference ns:hasDeadline ?date)
>>
>> now(?now)
>>
>> greaterThan(?now, ?date)
>>
>> ->
>>
>> (?conference ns:status ns:DeadlinePassed)
>>
>> ]
> Well I was clearly thinking too complicated, so yes, your rule should
> work given that the docs say
>
>> lessThan(?x, ?y), greaterThan(?x, ?y)
>> le(?x, ?y), ge(?x, ?y)
>>
>> Test if x is <, >, <= or >= y. Only passes if both x and y are numbers
>> or time instants (can be integer or floating point or XSDDateTime).
> I was more thinking about things like inferring the age of a person
> isn't possible right now, but would clearly be some nice to have feature
> such that you could have it as implicit fact in your KB without the need
> to change the asserted data every year.
>
>> 2. When you say extend the rule system, you mean adding a class using as a 
>> starting point something is in ..rulesys.builtins and adapting it and then 
>> rebuild all the jars. I’m using Fuseki, so I’d have to rebuild that too, 
>> yeah? Aside from the fact I’m not coding in java, this isn’t the easiest 
>> path for me at the moment.
> That's also something I can't answer properly. I mean, yes, you can
> create custom built-ins and register those or maybe create an overriding
> registry [1] ? But not sure, it looks like at least the overriding
> registry would have to be used by the rule parser, so I don't know how
> you would have to combine it with Fuseki. And in the end, yes, you have
> to repackage Fuseki I think as long as you modify the existing
> BuiltinRegistry.
>
> Maybe there is also some other kind of plugin system here, but that can
> only be answered by Andy, Dave, Adam, etc.
>
>
> [1] 
> https://issues.apache.org/jira/browse/JENA-1204
>
>> Many thanks,
>> Pierre
>>
>>
>> From: Lorenz B. [mailto:buehm...@informatik.uni-leipzig.de]
>> Sent:

Re: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

2019-05-17 Thread Dave Reynolds


Hi Pierre,

I can't offer to hold you by the hand I'm afraid, snowed under with 
work. But a minimal example might help. Here's an example of a minimal 
extension builtin:


class StringEqualIgnoreCase extends BaseBuiltin implements Builtin {

public String getName() {
return "stringEqualIgnoreCase";
}

@Override
public int getArgLength() {
return 2;
}

@Override
public boolean bodyCall(Node[] args, int length, RuleContext context) {
checkArgs(length, context);
Node n1 = getArg(0, args, context);
Node n2 = getArg(1, args, context);
if (n1.isLiteral() && n1.isLiteral()) {
return n1.getLiteralLexicalForm().equalsIgnoreCase( 
n2.getLiteralLexicalForm() );

} else {
return false;
}
}

}

and an example driver class for demonstrating it operating:

/**
 * Rule test.
 */
public void testRuleSet2() {
String NS = "http://ont.com/;;
BuiltinRegistry.theRegistry.register( new 
StringEqualIgnoreCase() );
String rules = "[r1: (?x ns:p ?pl) (?x ns:q ?ql) 
stringEqualIgnoreCase(?pl, ?ql) -> (?x ns:r 'equal') ]";

Model m = ModelFactory.createDefaultModel();
Resource a = m.createResource(NS + "a");
Resource b = m.createResource(NS + "b");
Property p = m.createProperty(NS + "p");
Property q = m.createProperty(NS + "q");
m.add(a, p, "FOO");
m.add(a, q, "foo");
m.add(b, p, "FOO");
m.add(b, q, "foobar");
GenericRuleReasoner reasoner = new GenericRuleReasoner(Rule
.parseRules(rules));
InfModel infModel = ModelFactory.createInfModel(reasoner, m);
infModel.write(System.out, "Turtle");
}

These are cut/paste from some very ancient examples but hopefully should 
work, if not let us know I can see about assembling it into a self 
contained working example.


As it says in the documentation, for examples of how to write particular 
sorts of builtin then the best place is to look is the source code for 
the current builtins.


Dave

On 17/05/2019 07:53, Pierre Grenon wrote:

Hi

Thanks again.

Hear you.

I think this is becoming a bit too meta perhaps. Maybe there’s a couple of ways 
to go forward.


a.  Anybody is a taker to hold me by the hand and use this thread to come 
up with a complete cycle for making a new built in and adding it to my fuseki? 
If somebody has the time to do this---and I’m happy that it takes what it 
takes, I can’t on my end make it a high priority--, we could reuse the thread 
for the purpose of a detailed how-to for noobs like me.

b.  I think I actually tried the rule below and I didn’t get any inference 
result. Don’t know if it’s my config, my rule or my data. I could start a. by 
trying to provide a dataset and config file as well. Again, anybody willing to 
hold my hand?

Give a shout.

Thanks,
Pierre

From: Lorenz B. [mailto:buehm...@informatik.uni-leipzig.de]
Sent: 17 May 2019 07:24
To: users@jena.apache.org
Subject: Re: Documentation/tutorial on using dates in Jena rules with 
GenericRuleReasoner

Hi,


Hi Lorenz,

Thank you for your answer.

Quick follow up.

I think the issue for me is the documentation of the built-ins is too abstract 
or relies on understanding the source code. So I suppose, documentation / 
tutorial seems somewhat superfluous when you can do that – only I can’t 
understand what’s there and the source at the moment.

I can see that it might be too abstract for people coming from different
areas, sure. But, the question is who is able to provide such a tutorial
and also who has the time. It's always a trade-off in Open Source
projects like Jena - I guess most of the devs or other project related
people here are not getting payed, and clearly such a tutorial for most
if not all of the built-ins definitely needs some effort. Ideally, the
community could take over those things, but looks like nobody ever wrote
blog posts or tutorials about the Jena rule system and its built-ins.




1. Yes, I seem to understand difference is a no go but I was wondering if there 
might be some work around coercing the dateTime to something else. I’m not sure 
I understood that very well but it looks like I can’t use functions in 
arguments of built-ins (so no xsd:year(?date) or whatever).

I don't think you can use functions or expressions from the SPARQL
engine resp. its XPath constructors. Both are totally different
implementations I guess - but again, I'm not a developer, so I can't
make a valid statement, except for looking into the code and the docs.
 From my point of view, only the mentioned built-ins from the docs are
valid so far.




But then, on greaterThan, something should be workable if I have xsd:dateTime, 
no?

What’s wrong with :



[ruleMissedDeadline2:

(?conference ns:hasDeadline ?date)

now(?now)

greaterThan(?now, ?date)

->

(?conference ns:status ns:DeadlinePassed)

]


Well I was clearly

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

2019-05-17 Thread Pierre Grenon

Hi

Thanks again.

Hear you.

I think this is becoming a bit too meta perhaps. Maybe there’s a couple of ways 
to go forward.


a.  Anybody is a taker to hold me by the hand and use this thread to come 
up with a complete cycle for making a new built in and adding it to my fuseki? 
If somebody has the time to do this---and I’m happy that it takes what it 
takes, I can’t on my end make it a high priority--, we could reuse the thread 
for the purpose of a detailed how-to for noobs like me.

b.  I think I actually tried the rule below and I didn’t get any inference 
result. Don’t know if it’s my config, my rule or my data. I could start a. by 
trying to provide a dataset and config file as well. Again, anybody willing to 
hold my hand?

Give a shout.

Thanks,
Pierre

From: Lorenz B. [mailto:buehm...@informatik.uni-leipzig.de]
Sent: 17 May 2019 07:24
To: users@jena.apache.org
Subject: Re: Documentation/tutorial on using dates in Jena rules with 
GenericRuleReasoner

Hi,

> Hi Lorenz,
>
> Thank you for your answer.
>
> Quick follow up.
>
> I think the issue for me is the documentation of the built-ins is too 
> abstract or relies on understanding the source code. So I suppose, 
> documentation / tutorial seems somewhat superfluous when you can do that – 
> only I can’t understand what’s there and the source at the moment.
I can see that it might be too abstract for people coming from different
areas, sure. But, the question is who is able to provide such a tutorial
and also who has the time. It's always a trade-off in Open Source
projects like Jena - I guess most of the devs or other project related
people here are not getting payed, and clearly such a tutorial for most
if not all of the built-ins definitely needs some effort. Ideally, the
community could take over those things, but looks like nobody ever wrote
blog posts or tutorials about the Jena rule system and its built-ins.
>
>
>
> 1. Yes, I seem to understand difference is a no go but I was wondering if 
> there might be some work around coercing the dateTime to something else. I’m 
> not sure I understood that very well but it looks like I can’t use functions 
> in arguments of built-ins (so no xsd:year(?date) or whatever).
I don't think you can use functions or expressions from the SPARQL
engine resp. its XPath constructors. Both are totally different
implementations I guess - but again, I'm not a developer, so I can't
make a valid statement, except for looking into the code and the docs.
From my point of view, only the mentioned built-ins from the docs are
valid so far.
>
>
>
> But then, on greaterThan, something should be workable if I have 
> xsd:dateTime, no?
>
> What’s wrong with :
>
>
>
> [ruleMissedDeadline2:
>
> (?conference ns:hasDeadline ?date)
>
> now(?now)
>
> greaterThan(?now, ?date)
>
> ->
>
> (?conference ns:status ns:DeadlinePassed)
>
> ]

Well I was clearly thinking too complicated, so yes, your rule should
work given that the docs say

> lessThan(?x, ?y), greaterThan(?x, ?y)
> le(?x, ?y), ge(?x, ?y)
>
> Test if x is <, >, <= or >= y. Only passes if both x and y are numbers
> or time instants (can be integer or floating point or XSDDateTime).
I was more thinking about things like inferring the age of a person
isn't possible right now, but would clearly be some nice to have feature
such that you could have it as implicit fact in your KB without the need
to change the asserted data every year.

>
> 2. When you say extend the rule system, you mean adding a class using as a 
> starting point something is in ..rulesys.builtins and adapting it and then 
> rebuild all the jars. I’m using Fuseki, so I’d have to rebuild that too, 
> yeah? Aside from the fact I’m not coding in java, this isn’t the easiest path 
> for me at the moment.

That's also something I can't answer properly. I mean, yes, you can
create custom built-ins and register those or maybe create an overriding
registry [1] ? But not sure, it looks like at least the overriding
registry would have to be used by the rule parser, so I don't know how
you would have to combine it with Fuseki. And in the end, yes, you have
to repackage Fuseki I think as long as you modify the existing
BuiltinRegistry.

Maybe there is also some other kind of plugin system here, but that can
only be answered by Andy, Dave, Adam, etc.


[1] 
https://issues.apache.org/jira/browse/JENA-1204

>
> Many thanks,
> Pierre
>
>
> From: Lorenz B. [mailto:buehm...@informatik.uni-leipzig.de]
> Sent: 16 May 2019 08:33
> To: users@jena.apache.org
> Subject: Re: Documentation/tutorial on using dates in Jena rules with 
> GenericRuleReasoner
>
> I'm not aware of any tutorial, but afaik you can't do what you did here
> with SPARQL in Jena rules without writing custom built-ins or by
> extending the existing ones because:
>
> * the "difference" built-in does only work for numbers right now [1]
>
> * there is no support for duration type at all it looks like
>
>
> So,

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

2019-05-16 Thread Pierre Grenon

Hi Lorenz,

Thank you for your answer.

Quick follow up.

I think the issue for me is the documentation of the built-ins is too abstract 
or relies on understanding the source code. So I suppose, documentation / 
tutorial seems somewhat superfluous when you can do that – only I can’t 
understand what’s there and the source at the moment.



1.  Yes, I seem to understand difference is a no go but I was wondering if 
there might be some work around coercing the dateTime to something else. I’m 
not sure I understood that very well but it looks like I can’t use functions in 
arguments of built-ins (so no xsd:year(?date) or whatever).



But then, on greaterThan, something should be workable if I have xsd:dateTime, 
no?

What’s wrong with :



[ruleMissedDeadline2:

(?conference ns:hasDeadline ?date)

now(?now)

greaterThan(?now, ?date)

->

(?conference ns:status ns:DeadlinePassed)

]

2. When you say extend the rule system, you mean adding a class using as a 
starting point something is in ..rulesys.builtins and adapting it and then 
rebuild all the jars. I’m using Fuseki, so I’d have to rebuild that too, yeah? 
Aside from the fact I’m not coding in java, this isn’t the easiest path for me 
at the moment.

Many thanks,
Pierre


From: Lorenz B. [mailto:buehm...@informatik.uni-leipzig.de]
Sent: 16 May 2019 08:33
To: users@jena.apache.org
Subject: Re: Documentation/tutorial on using dates in Jena rules with 
GenericRuleReasoner

I'm not aware of any tutorial, but afaik you can't do what you did here
with SPARQL in Jena rules without writing custom built-ins or by
extending the existing ones because:

* the "difference" built-in does only work for numbers right now [1]

* there is no support for duration type at all it looks like


So, so far you could only compare datetime values via lessThan, le,
greaterThan, ge but there is no other built-in with support for date
values so far. Others might indeed correct me if I'm wrong of.


It looks like, you have to extend the rule system by custom built-ins -
it's not that difficult though [2]

[1]
https://github.com/apache/jena/blob/master/jena-core/src/main/java/org/apache/jena/reasoner/rulesys/builtins/Difference.java#L68
[2] 
https://jena.apache.org/documentation/inference/#builtins

> Could people recommend a good reference/tutorial on how to use built-ins 
> (greaterThan, difference, now etc) with dates (e.g., datetime, duration and 
> so on) in rules for the GenericRuleReasoner?
>
> Example:
>
> Assume a KB of conferences with their deadlines as xsd:dateTime.
>
> Here are examples of SPARQL queries to find conferences whose deadlines are 
> passed:
>
> SELECT * WHERE {
> ?subject here:hasDeadline ?date .
> BIND((xsd:dateTime(?date) - now()) AS ?Span)
> FILTER(?Span < "P0D"^^xsd:duration)
> }
>
> SELECT * WHERE {
> ?subject here:hasDeadline ?date .
> FILTER(now() > xsd:dateTime(?date))
> }
>
> Suppose instead I wanted to infer some attribute of the conference, e.g:
>
> ?subject here:hasStatus here:DeadlinePassed
>
> I don't really get how to do that in a rule and I can't quite figure if I'm 
> misusing the built-ins or just mixing SPARQL and rule syntax (e.g., when 
> trying to coerce variables to datatypes).
>
> There's a bunch of recurring questions around that sort of rules but I can't 
> quite find any answer that's giving clear examples.
>
> Thus I would find it useful if anybody could point at a resource that goes 
> through some sort of how to do date comparison and use that in rules as the 
> Jena doc on built-in is not self-contained in that respect.
>
> https://jena.apache.org/documentation/inference/#rules
>
>
> With many thanks and kind regards,
> Pierre
>

--
Lorenz Bühmann
AKSW group, University of Leipzig
Group: http://aksw.org - semantic web research center

THIS E-MAIL MAY CONTAIN CONFIDENTIAL AND/OR PRIVILEGED INFORMATION. 
IF YOU ARE NOT THE INTENDED RECIPIENT (OR HAVE RECEIVED THIS E-MAIL 
IN ERROR) PLEASE NOTIFY THE SENDER IMMEDIATELY AND DESTROY THIS 
E-MAIL. ANY UNAUTHORISED COPYING, DISCLOSURE OR DISTRIBUTION OF THE 
MATERIAL IN THIS E-MAIL IS STRICTLY FORBIDDEN. 

IN ACCORDANCE WITH MIFID II RULES ON INDUCEMENTS, THE FIRM'S EMPLOYEES 
MAY ATTEND CORPORATE ACCESS EVENTS (DEFINED IN THE FCA HANDBOOK AS 
"THE SERVICE OF ARRANGING OR BRINGING ABOUT CONTACT BETWEEN AN INVESTMENT 
MANAGER AND AN ISSUER OR POTENTIAL ISSUER"). DURING SUCH MEETINGS, THE 
FIRM'S EMPLOYEES MAY ON NO ACCOUNT BE IN RECEIPT OF INSIDE INFORMATION 
(AS DESCRIBED IN ARTICLE 7 OF THE MARKET ABUSE REGULATION (EU) NO 596/2014). 
(https://www.handbook.fca.org.uk/handbook/glossary/G3532m.html)
COMPANIES WHO DISCLOSE INSIDE INFORMATION ARE IN BREACH OF REGULATION 
AND MUST IMMEDIATELY AND CLEARLY NOTIFY ALL ATTENDEES.

Re: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

Re: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

Re: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

Re: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

RE: Documentation/tutorial on using dates in Jena rules with GenericRuleReasoner

13 matches

Site Navigation

Mail list logo

Footer information