Re: [dss] XMLData opaqueness ?

[Juan Carlos Cruellas <cruellas@ac.upc.edu>]

Ed, see below, intermixed....
Edward Shallow wrote:

>OK I'll try some other things. I can serialize at the node level so handling
>this as staright XML is definitely doable, I just thought that we might want
>to honor this escaping approach to really isolate the XMLData content.
>
I saw your point, and if you may ascertain that escaping a '<' in the middle
of the contents of an element, the process by which you pass from the
"escaped" xml document to the originial one still keeps the &lt; in the
middle of the contents of the aforementioned element, and if we may arrive
to the conclusion that this is doable by all the parsers, then I think that
we could consider this approach, otherwise, we could face different 
behaviour
deppending of the tools.
One of the things that I thought at first sigth was: "OK, for people that
do not have exclusive canonicalization, tehre is always the posibility
of b64-encode the xml docs, put them in the Base64 element and that is all
about it....but still need to be sure that we are able to correctly deal
with XMLData element contents....

> Did
>not one of the public comments mention problems associated with unwanted
>namespace inheritance from parent nodes in the request ?
>  
>
So far we have not received any other comment about that...I think that 
maybe
one of the things that we should do is to test this feature in the 
interop and
leave it documented.....

Regards and sorry for replying so late (19:50 here)...

Juan Carlos.

>Ed   
>
>-----Original Message-----
>From: Juan Carlos Cruellas [mailto:cruellas@ac.upc.edu] 
>Sent: April 6, 2005 8:40 AM
>Cc: 'OASIS DSS TC'
>Subject: Re: [dss] XMLData opaqueness ?
>
>Ed, I am not familiar with the library you mention.
>I know that there are others that seem to behave in different way. I am
>using JDOM, for instance, and there if you add to an element a xml tree as
>content, the '<' and the '>' are kept and you can see the tree within the
>element.
>Obviously this alternative would not allow to include the PI <?xml....> ....
>What you mention seems to me as if you had ordered to the library to add the
>XML document as TEXT content to the element, which forces the escaping of
>all the '<' and '>'... and this brings me back to my question: could you try
>to put within the xml document an element with some text that has some &lt;
>(ie an escaped '<') and then see if when reading the parser is able to
>rebuild the original document?
>
>Juan Carlos.
>Edward Shallow wrote:
>
>  
>
>>Hi,
>>
>> I am bringing this up because this is exactly what my parser is doing 
>>(with encoding=None) when I build the XML request document. Because I 
>>am building by setting node content, the library (libxml2) knows what 
>>is structure and what is content. When I serialize the parsed object in 
>>order to prepare to send it to the DSS Server, it substitutes the 
>>escapes only in the node containing the XML content.
>>
>> My server happily parses the request (with the XML in the XMLData node).
>>Then again I am using the same library on both sides.
>>
>> Rich ... Is escaped HTML valid in a UTF-8 encoded XML document ? Is 
>>the referenced escaping OK ?
>>
>>Cheers,
>>Ed
>>
>>-----Original Message-----
>>From: Juan Carlos Cruellas [mailto:cruellas@ac.upc.edu]
>>Sent: April 5, 2005 11:56 AM
>>To: ed.shallow@rogers.com
>>Cc: 'OASIS DSS TC'
>>Subject: Re: [dss] XMLData opaqueness ?
>>
>>Ed,
>>
>>Your suggestion is to escape all the '<' and '>' so that in plain 
>>words, within <XMLData> there is not xml any more but a String coming 
>>    
>>
>>from the serialization of a XML document or subtree where '<' and '>' 
>  
>
>>have been escaped...
>>I have a doubt: are we sure that any parser would be able to correctly 
>>undo the escape operations? I mean, what if within the original XML 
>>document there are '<' or '>' escaped documents as text (ie, as 
>>characters of the text content of certain elements)?
>>Are we sure that the parser at the receiver will be able to distinguish 
>>which escaped characters will have to unescape?
>>
>>Juan Carlos.
>>
>>Edward Shallow wrote:
>>
>> 
>>
>>    
>>
>
>
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