BTW, there seems to be a related question on StackOverflow: http://answers.semanticweb.com/questions/610/ordering-by-time-in-sparql-query
I might just give up building an xsd:dateTime and use separate year/month/day components. On Thu, Nov 14, 2013 at 7:26 PM, Martynas Jusevičius <marty...@graphity.org> wrote: > Andy, now I'm confused. Where are you looking? I checked the RDF/XML > version of Time ontology and it says: > > <owl:DatatypeProperty rdf:ID="year"> > <rdfs:domain rdf:resource="#DateTimeDescription" /> > <rdfs:range rdf:resource="&xsd;gYear" /> > </owl:DatatypeProperty> > > <owl:DatatypeProperty rdf:ID="month"> > <rdfs:domain rdf:resource="#DateTimeDescription" /> > <rdfs:range rdf:resource="&xsd;gMonth" /> > </owl:DatatypeProperty> > > <owl:DatatypeProperty rdf:ID="day"> > <rdfs:domain rdf:resource="#DateTimeDescription" /> > <rdfs:range rdf:resource="&xsd;gDay" /> > </owl:DatatypeProperty> > > On Thu, Nov 14, 2013 at 7:10 PM, Andy Seaborne <a...@apache.org> wrote: >> On 14/11/13 16:42, Martynas Jusevičius wrote: >>> >>> OK I was probably too quick - now I realized the syntax of xsd:gMonth >>> and xsd:gDay is not so simple... >> >> >> :-) >> >> http://www.w3.org/TR/xmlschema11-2/#dateTime for details. >> >> The range of time:month is a non-negative integer so may be single digit. >> That'll need normalizing and checking to use xsd: where it must be two >> digits. Ditto time:day. And maybe people write years as two digits. >> >> gMonth and gDay have "missing parts" indicators "--" and "---" >> but I don't see any g* here. >> >> Andy >> >> >>> >>> On Thu, Nov 14, 2013 at 4:05 PM, Martynas Jusevičius >>> <marty...@graphity.org> wrote: >>>> >>>> I came up with an approach that concatenates lexical values and >>>> doesn't need Calendar or DateTimeStruct. >>>> >>>> Not sure however how this aligns with the range of time:inXSDDateTime >>>> which is xsd:dateTime - can xsd:gYear/xsd:gMonthDay/xsd:date be >>>> treated as xsd:dateTime values? I guess I'll have to typecast them in >>>> SPARQL. >>>> >>>> if >>>> (resource.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#inDateTime";))) >>>> { >>>> Literal dateTime; >>>> Resource dateTimeDesc = >>>> >>>> resource.getPropertyResourceValue(ResourceFactory.createProperty("http://www.w3.org/2006/time#inDateTime";)); >>>> >>>> if >>>> (!dateTimeDesc.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#year";))) >>>> throw new DateTimeParseException("time:year value is >>>> missing"); >>>> RDFNode yearObject = >>>> >>>> dateTimeDesc.getProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#year";)).getObject(); >>>> if (!yearObject.isLiteral()) >>>> throw new DateTimeParseException("time:year value is >>>> not a Literal"); >>>> >>>> if >>>> (dateTimeDesc.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#month";))) >>>> { >>>> RDFNode monthObject = >>>> >>>> dateTimeDesc.getProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#month";)).getObject(); >>>> if (!monthObject.isLiteral()) >>>> throw new DateTimeParseException("time:month value >>>> is not a Literal"); >>>> >>>> if >>>> >>>> (dateTimeDesc.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#day";))) >>>> { >>>> RDFNode dayObject = >>>> >>>> dateTimeDesc.getProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#day";)).getObject(); >>>> if (!dayObject.isLiteral()) >>>> throw new DateTimeParseException("time:day >>>> value is not a Literal"); >>>> >>>> dateTime = >>>> >>>> resource.getModel().createTypedLiteral(yearObject.asLiteral().getLexicalForm() >>>> + "-" + >>>> monthObject.asLiteral().getLexicalForm() >>>> + "-" + >>>> dayObject.asLiteral().getLexicalForm(), >>>> XSDDatatype.XSDdate); >>>> } >>>> else >>>> { >>>> dateTime = >>>> >>>> resource.getModel().createTypedLiteral(yearObject.asLiteral().getLexicalForm() >>>> + "-" + >>>> >>>> monthObject.asLiteral().getLexicalForm(), >>>> XSDDatatype.XSDgMonthDay); >>>> } >>>> } >>>> else >>>> dateTime = yearObject.asLiteral(); >>>> >>>> >>>> resource.addLiteral(ResourceFactory.createProperty("http://www.w3.org/2006/time#inXSDDateTime";), >>>> dateTime); >>>> } >>>> >>>> On Thu, Nov 14, 2013 at 3:08 PM, Martynas Jusevičius >>>> <marty...@graphity.org> wrote: >>>>> >>>>> I'll try DateTimeStruct again, but that basically means I need my own >>>>> copy of the class, since I currently cannot extend it to override the >>>>> private constructor? >>>>> >>>>> On Thu, Nov 14, 2013 at 2:15 PM, Andy Seaborne <a...@apache.org> wrote: >>>>>> >>>>>> Hi there, >>>>>> >>>>>> DateTimeStruct is, well, a struct. The fields are public. You could >>>>>> write a >>>>>> builder to target that. The default constructor could be made public. >>>>>> The >>>>>> statics are specific patterns for the XSD date/time datatypes with >>>>>> validation. >>>>>> >>>>>> DateTimeStruct represents the Date/time Seven-property model of XSD. >>>>>> It can >>>>>> produce the string for xsd:date or xsd:dateTime but not the gregorial >>>>>> g* >>>>>> datatypes. >>>>>> >>>>>> java.util.calendar is OK as a value but, in the details, unusable for >>>>>> XSD >>>>>> types. Why not set DateTimeStruct fields? >>>>>> >>>>>> javax.xml.datatype.XMLGregorianCalendar could be of use - it has >>>>>> getters and >>>>>> setters. >>>>>> >>>>>> For DateTimeStruct or XMLGregorianCalendar, you can then use >>>>>> >>>>>> createTypedLiteral(String lex, RDFDatatype dtype) >>>>>> >>>>>> >>>>>>> Not all mandatory - the >>>>>>> format can be YYYY, YYYY-MM, YYYY-MM-DD. >>>>>> >>>>>> >>>>>> You could build the lexical form. >>>>>> >>>>>> Andy >>>>>> >>>>>> >>>>>> On 14/11/13 02:02, Martynas Jusevičius wrote: >>>>>>> >>>>>>> >>>>>>> Hey, >>>>>>> >>>>>>> I have datetime components as 3 separate literals, with xsd:gYear, >>>>>>> xsd:gMonth, xsd:gDay respective datatypes. Not all mandatory - the >>>>>>> format can be YYYY, YYYY-MM, YYYY-MM-DD. >>>>>>> >>>>>>> Now how do I combine those into a single xsd:dateTime Literal? A >>>>>>> concrete use case would be converting time:inDateTime values into >>>>>>> time:inXSDDateTime values: >>>>>>> http://www.w3.org/TR/owl-time/#calclock >>>>>>> >>>>>>> I came up with the code below which seems to work but is not pretty >>>>>>> (and doesn't deal with time). I also looked at DateTimeStruct but >>>>>>> either way there seemed to be some datatype mismatch. I think it would >>>>>>> make more sense for DateTimeStruct to use the builder pattern instead >>>>>>> of static methods. >>>>>>> >>>>>>> Is there a better way? >>>>>>> >>>>>>> if >>>>>>> >>>>>>> (resource.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#inDateTime";))) >>>>>>> { >>>>>>> Calendar calendar = Calendar.getInstance(); >>>>>>> Resource dateTimeDesc = >>>>>>> >>>>>>> >>>>>>> resource.getPropertyResourceValue(ResourceFactory.createProperty("http://www.w3.org/2006/time#inDateTime";)); >>>>>>> >>>>>>> if >>>>>>> >>>>>>> (dateTimeDesc.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#year";))) >>>>>>> { >>>>>>> RDFNode object = >>>>>>> >>>>>>> >>>>>>> dateTimeDesc.getProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#year";)).getObject(); >>>>>>> if (object.isLiteral()) >>>>>>> { >>>>>>> Literal literal = object.asLiteral(); >>>>>>> calendar.set(Calendar.YEAR, >>>>>>> Integer.parseInt(literal.getLexicalForm())); >>>>>>> } >>>>>>> } >>>>>>> else throw new DateTimeParseException("time:year value >>>>>>> is >>>>>>> missing"); >>>>>>> >>>>>>> if >>>>>>> >>>>>>> (dateTimeDesc.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#month";))) >>>>>>> { >>>>>>> RDFNode object = >>>>>>> >>>>>>> >>>>>>> dateTimeDesc.getProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#month";)).getObject(); >>>>>>> if (object.isLiteral()) >>>>>>> { >>>>>>> Literal literal = object.asLiteral(); >>>>>>> calendar.set(Calendar.MONTH, >>>>>>> Integer.parseInt(literal.getLexicalForm())); >>>>>>> } >>>>>>> } >>>>>>> >>>>>>> if >>>>>>> >>>>>>> (dateTimeDesc.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#day";))) >>>>>>> { >>>>>>> RDFNode object = >>>>>>> >>>>>>> >>>>>>> dateTimeDesc.getProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#day";)).getObject(); >>>>>>> if (object.isLiteral()) >>>>>>> { >>>>>>> Literal literal = object.asLiteral(); >>>>>>> calendar.set(Calendar.DAY_OF_MONTH, >>>>>>> Integer.parseInt(literal.getLexicalForm())); >>>>>>> } >>>>>>> } >>>>>>> >>>>>>> calendar.set(Calendar.HOUR, 0); >>>>>>> calendar.set(Calendar.MINUTE, 0); >>>>>>> calendar.set(Calendar.SECOND, 0); >>>>>>> Literal dateTime = >>>>>>> resource.getModel().createTypedLiteral(calendar); >>>>>>> >>>>>>> >>>>>>> resource.addLiteral(ResourceFactory.createProperty("http://www.w3.org/2006/time#inXSDDateTime";), >>>>>>> dateTime); >>>>>>> } >>>>>>> >>>>>>> Martynas >>>>>>> graphityhq.com >>>>>>> >>>>>> >>
