- From: <Toman_Vojtech@emc.com>
- Date: Tue, 25 Nov 2008 07:03:30 -0500
- To: <public-xml-processing-model-comments@w3.org>
Hi all, In the test suite, there is a test named 'preserve-base-uri-001'. It tests that the base URI property of the nodes is preserved after you remove the xml:base attributes (using p:delete). The test does the following: <p:pipeline> <p:delete match="@xml:base"> <p:input port="source"> <doc xml:base="http://example.com/base/"> <chap xml:base="http://example.com/base/chaps/"> <para>...</para> </chap> </doc> </p:input> </p:delete> <p:string-replace match="para/text()"> <p:with-option name="replace" select="concat('"',p:base-uri(/doc/chap),'"')"/> </p:string-replace> <p:pipeline> And it is expected to return this document: <doc> <chap> <para>http://example.com/base/chaps/</para> </chap> </doc> My question is: Is this actually correct? In Section 2.4.1 of the spec, there is a sentence that lists the Infoset properties that all processors must preserve, one of which is the 'base URI' property. However, in the very same sentence it also says that this holds for all steps "except where the semantics of a step explicitly require changes". In my view, p:delete is clearly a step that updates the source document. The problem I have is that I simply don't know what should happen to document nodes if you remove the xml:base attribute. Suppose I remove chap/@xml:base in the following example: <doc xml:base="http://foo.com"> <chap xml:base="http://bar.com"> <p>...</p> </chap> </doc> If the 'base URI' property of the node is to be preserved, the base URIs of both the 'chap' and 'p' elements will remain "http://bar.com". Or, should the base URI of 'chap' and 'p' be recalculated so that it is "http://foo.com" after removing chap/@xml:base? I just don't know. I can also see similar questions with steps that can modify or create @xml:base attributes: p:add-xml-base (maybe this one is OK), p:string-replace, p:add-attribute, p:set-attributes (now I am wondering: can you actually address/create xml:base with these steps??). Regards, Vojtech Thanks, Vojtech
Received on Tuesday, 25 November 2008 12:15:10 UTC