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RE: [EXI] Encoding qname

From: santhanakrishnan <santhana@huawei.com>
Date: Fri, 04 Apr 2008 12:38:49 +0530
To: public-exi@w3.org
Message-id: <000a01c89622$bc10ef20$4a18120a@china.huawei.com>
Hi EXI experts

       I believe the in the EXI example discussed in
http://www.w3.org/XML/EXI/tutorial/exi-examples.html  the prefix encoding is
missing as per my understanding of the snippets from the specification
highlighted below. 

 

"Values of type QName are encoded as a sequence of values representing the
URI, local-name and prefix components of the QName in that order, where the
prefix component is present only when the preserve.prefixes option is set to
true"

But in the EXI example encoding discussed in
"http://www.w3.org/XML/EXI/tutorial/exi-examples.html" and in other examples
in the EXI primer, where the preserve.prefixes fidelity option is also set,
the encoding of the prefix is missing for all qnames. For all the element
encoding we encode the uri (based on miss or hit accordingly), followed by
the qname. But the prefix encoding is not done after this.

 

Also the spec states the rules for determining the effective prefix value.

1) If the prefix is defined, select the m-th prefix value associated with
the URI of the QName as the candidate prefix value. Otherwise, there is no
candidate prefix value. 

2) If the QName value is part of an SE event followed by an associated NS
event with an indicator value of 1, the prefix value is the prefix of such
NS event. Otherwise, the prefix value is the candidate value, if any,
selected in step 1 above.

As per the second rule if there is an NS event with indicator set to 1 then
the prefix value is taken from such NS event. Event these talk about the
selection of the prefix but never say that it need not be encoded in any
particular case. 

 

Please solve my confusion regarding this.

 

Thanks and Regards

Santhanakrishnan

 

 

  _____  

From: public-exi-request@w3.org [mailto:public-exi-request@w3.org] On Behalf
Of santhanakrishnan
Sent: Tuesday, March 25, 2008 8:05 PM
To: public-exi@w3.org
Subject: [EXI] Encoding qname

 

Hi

       The section 7.1.7 Qname in the EXI Format 1.0 specification states 

"Values of type QName are encoded as a sequence of values representing the
URI, local-name and prefix components of the QName in that order, where the
prefix component is present only when the preserve.prefixes option is set to
true"

But in the EXI example encoding discussed in
"http://www.w3.org/XML/EXI/tutorial/exi-examples.html" and in other examples
in the EXI primer, where the preserve.prefixes fidelity option is also set,
the encoding of the prefix is missing for all qnames. For all the element
encoding we encode the uri (based on miss or hit accordingly), followed by
the qname. But the prefix encoding is not done after this.

 

Thanks in advance

Santhanakrishnan
Received on Friday, 4 April 2008 07:09:49 GMT

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