Re: Issue with displaying URI prefixes on child elements using NSXML

2008-06-15 Thread Chris Suter 


On 12/06/2008, at 6:54 PM, Nathan Kinsinger wrote:

I'm curious about what using elementWithName:URI: is supposed to do  
when you don't pass a qualified name in, or rather, why have it at  
all? The URI seems to be redundant if you are already passing the  
qualified name in.


Just as a test (from the OP's code)

NSXMLElement *root = [NSXMLNode elementWithName:@root];

	[root addNamespace:[NSXMLNode namespaceWithName:@a stringValue:@http://www.tempurl.com 
]];


	NSXMLElement *child = [NSXMLNode elementWithName:@child URI:@http://www.tempurl.com 
];

[child addChild:[NSXMLNode textWithStringValue:@myText]];
[root addChild:child];

NSXMLElement *child2 = [NSXMLNode elementWithName:@child];
[child2 addChild:[NSXMLNode textWithStringValue:@myOtherText]];
[root addChild:child2];

NSXMLElement *child3 = [NSXMLNode elementWithName:@a:child];
	[child3 addChild:[NSXMLNode textWithStringValue:@something  
completely different]];

[root addChild:child3];

NSLog(@a:child  = %@, [root elementsForName:@a:child]);

gives the result:
a:child  = (
   childmyText/child,
   a:childsomething completely different/a:child
)

So the NSXMLElement has an internal state (that the first child is  
in the a namespace) that is not in it's XML representation? If you  
were to save it and then read it back in you would lose that  
information.


From the few bits of XML I've dealt with I never needed to deal with  
namespaces, I'm just curious about this.


I think it’s this way because you don’t necessarily need to include  
the prefix within the mark-up (the namespace can be dictated by the  
default) so there needs to be a way of indicating whether or not a  
prefix is included. You’re correct that you’d lose that information if  
you were to save and then load it back in (so long as there’s no  
default namespace). There’s the -canonicalXMLStringPreservingComments:  
method that I believe will ensure that all names have prefixes.


- Chris

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Re: Issue with displaying URI prefixes on child elements using NSXML

2008-06-12 Thread Chris Suter 


On 11/06/2008, at 3:19 PM, Lawrence Johnston wrote:


Hey everybody, I've got an issue that I can't figure out.

If I'm using this code:

NSString *XMLForDisplay {

NSXMLElement *root = [NSXMLNode elementWithName:@root];
[root addNamespace:[NSXMLNode namespaceWithName:@a stringValue:@http://www.tempurl.com 
]];


NSXMLElement *child = [NSXMLNode elementWithName:@child URI:@http://www.tempurl.com 
];

[child addChild:[NSXMLNode textWithStringValue:@myText]];

[root addChild:child];

return [root XMLStringWithOptions:NSXMLNodePrettyPrint];
}


I believe it should be outputting this text:

root xmlns:a=http://www.tempurl.com;
a:childmyText/a:child
/root

However, instead it outputs this text (note the lack of prefix on  
the child):


root xmlns:a=http://www.tempurl.com;
childmyText/child
/root

This is an issue, because I need that a: prefix.

The documentation for elementWithName:URI: states it's equivalent to  
URI:name/URI:name, which is exactly what I want, except that I  
can't get it to display that way.


Thanks for your time.


The documentation says that you need to pass the qualified name in. So  
you need to do:


NSXMLElement *child = [NSXMLNode elementWithName:@a:child URI:@http://www.tempurl.com 
];


You can look-up the prefix using NSXMLElement’s  
resolvePrefixForNamespaceURI: method although you probably don’t need  
to do that.


- Chris



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Re: Issue with displaying URI prefixes on child elements using NSXML

2008-06-12 Thread Lawrence Johnston 

It all makes sense now. Thanks.

On Jun 11, 2008, at 11:48 PM, Chris Suter wrote:



On 11/06/2008, at 3:19 PM, Lawrence Johnston wrote:


Hey everybody, I've got an issue that I can't figure out.

If I'm using this code:

NSString *XMLForDisplay {

NSXMLElement *root = [NSXMLNode elementWithName:@root];
[root addNamespace:[NSXMLNode namespaceWithName:@a stringValue:@http://www.tempurl.com 
]];


NSXMLElement *child = [NSXMLNode elementWithName:@child URI:@http://www.tempurl.com 
];

[child addChild:[NSXMLNode textWithStringValue:@myText]];

[root addChild:child];

return [root XMLStringWithOptions:NSXMLNodePrettyPrint];
}


I believe it should be outputting this text:

root xmlns:a=http://www.tempurl.com;
a:childmyText/a:child
/root

However, instead it outputs this text (note the lack of prefix on  
the child):


root xmlns:a=http://www.tempurl.com;
childmyText/child
/root

This is an issue, because I need that a: prefix.

The documentation for elementWithName:URI: states it's equivalent  
to URI:name/URI:name, which is exactly what I want, except that  
I can't get it to display that way.


Thanks for your time.


The documentation says that you need to pass the qualified name in.  
So you need to do:


NSXMLElement *child = [NSXMLNode elementWithName:@a:child URI:@http://www.tempurl.com 
];


You can look-up the prefix using NSXMLElement’s  
resolvePrefixForNamespaceURI: method although you probably don’t  
need to do that.


- Chris



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Re: Issue with displaying URI prefixes on child elements using NSXML

2008-06-12 Thread Nathan Kinsinger 


On Jun 12, 2008, at 12:48 AM, Chris Suter wrote:

The documentation says that you need to pass the qualified name in.  
So you need to do:


NSXMLElement *child = [NSXMLNode elementWithName:@a:child URI:@http://www.tempurl.com 
];


You can look-up the prefix using NSXMLElement’s  
resolvePrefixForNamespaceURI: method although you probably don’t  
need to do that.


- Chris


I'm curious about what using elementWithName:URI: is supposed to do  
when you don't pass a qualified name in, or rather, why have it at  
all? The URI seems to be redundant if you are already passing the  
qualified name in.


Just as a test (from the OP's code)

NSXMLElement *root = [NSXMLNode elementWithName:@root];

	[root addNamespace:[NSXMLNode namespaceWithName:@a stringValue:@http://www.tempurl.com 
]];


	NSXMLElement *child = [NSXMLNode elementWithName:@child URI:@http://www.tempurl.com 
];

[child addChild:[NSXMLNode textWithStringValue:@myText]];
[root addChild:child];

NSXMLElement *child2 = [NSXMLNode elementWithName:@child];
[child2 addChild:[NSXMLNode textWithStringValue:@myOtherText]];
[root addChild:child2];

NSXMLElement *child3 = [NSXMLNode elementWithName:@a:child];
	[child3 addChild:[NSXMLNode textWithStringValue:@something  
completely different]];

[root addChild:child3];

NSLog(@a:child  = %@, [root elementsForName:@a:child]);

gives the result:
a:child  = (
childmyText/child,
a:childsomething completely different/a:child
)

So the NSXMLElement has an internal state (that the first child is in  
the a namespace) that is not in it's XML representation? If you were  
to save it and then read it back in you would lose that information.


From the few bits of XML I've dealt with I never needed to deal with  
namespaces, I'm just curious about this.


--Nathan


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Issue with displaying URI prefixes on child elements using NSXML

2008-06-10 Thread Lawrence Johnston 

Hey everybody, I've got an issue that I can't figure out.

If I'm using this code:

NSString *XMLForDisplay {

  NSXMLElement *root = [NSXMLNode elementWithName:@root];
  [root addNamespace:[NSXMLNode namespaceWithName:@a stringValue:@http://www.tempurl.com 
]];


  NSXMLElement *child = [NSXMLNode elementWithName:@child URI:@http://www.tempurl.com 
];

  [child addChild:[NSXMLNode textWithStringValue:@myText]];

  [root addChild:child];

  return [root XMLStringWithOptions:NSXMLNodePrettyPrint];
}


I believe it should be outputting this text:

root xmlns:a=http://www.tempurl.com;
  a:childmyText/a:child
/root

However, instead it outputs this text (note the lack of prefix on the  
child):


root xmlns:a=http://www.tempurl.com;
  childmyText/child
/root

This is an issue, because I need that a: prefix.

The documentation for elementWithName:URI: states it's equivalent to  
URI:name/URI:name, which is exactly what I want, except that I  
can't get it to display that way.


Thanks for your time.
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