Re: XML::LibXML - Mixing XPath with a document fragment

On Thu, Jan 29, 2009 at 11:12 AM, Petr Pajas <[email protected]> wrote:
> On čt 29. ledna 2009, Petr Pajas wrote:
>> On čt 29. ledna 2009, Emmanuel Rodriguez wrote:
>> > Hi,
>> >
>> > I have an XML document that was generated with document
>> > fragments by an external function. This gave me some struggle
>> > because I was trying to use an XPath expression to access some
>> > nodes and couldn't reach them. This is due to the fact that
>> > even though the document fragment seems transparent it's still
>> > in the document and brakes the parent/child/sibling relation
>> > ship. This makes it a difficult to use XPath to search for
>> > nodes.
>> >
>> > Is there a way to clean document of all document fragments
>> > besides $xml =
>> > XML::LibXML->new()->parse_string($xml->toString()); ? Should
>> > document fragments be avoided?
>> >
>> > For the curious, I have attached a test case that shows the
>> > problems I had parsing the document.
>>
>> Hallo Emmanuel!
>>
>> A fragment node should never have appeared as a child of another
>> node; that's the bug!
>
> oh, and the bug is documented:-)
>
> addChild:
>
> As an alternative to appendChild() one can use the addChild()
> function. This function is a bit faster, because it avoids all DOM
> conformity checks.
>
> Well, in that case I might just add a simple node-type test and
> croak on fragments (and possibly other invalid node types). That
> will not cause any significant slow down.
>
> One should use appendChild() for correct DOM behavior.
>
Thanks Petr.
-- 
Emmanuel Rodriguez
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