Re: text to XML object (E4X)

Martin Honnen wrote:
> hluz wrote: 

>> var x = new XML(responseText)
>>
>> gives javascript error: xml is a reserved identifier.
>> If I remove the <?xml version="1.0"?> line from responseText before 
>> using it, it works fine.
> 
> 
> It is by design as the authors of the E4X specification wanted it, the 
> specification for
>   new XML(string)
> says to do the following (13.4.2):
>   Let x = ToXML(string)
> and ToXML(string) is specified as follows (10.3.1):
>   Parse the concatenation of
>   <parent xmlns=", defaultNamespace, ">", string, "</parent>"
> So that way a conforming implementation has to parse e.g.
>   <parent xmlns=""><?xml version="1.0"?><root /></parent>
> and that is not well-formed and gives a parse error.
> Thus if you want to parse a string with XML markup make sure you throw 
> the XML declaration away before passing the string to new XML().
> 
> A regular expression to match the XML declaration is e.g.
>   var xmlDeclaration = /^<\?xml version[^>]+?>/;
> so you could try removing it e.g.
>   new XML(responseText.replace(xmlDeclaration, ''))
> 

Thanks for your reply Martin. Yes, removing it works fine. Just one 
question: Shouldn't the xml declaration be considered a Processing 
Instruction and as such be ingnored when property 
XML.ignoreProcessingInstructions = true?