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Re: Catalogs, rewriteURI and xml:base

• From: cmarchand@oxiane.com
• To: xml-dev@lists.xml.org
• Date: Wed, 09 Nov 2016 16:23:44 +0100

Nobody ? Norm, Apache xml-community ?
No idea ?

Christophe

Le 2016-11-07 14:25, Christophe Marchand a écrit :

Hello,

I've something strange, and don't know if I do not understand OASIS
catalog specification, or if there is a bug in Apache Resolver...

I have this catalog :

<catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
  <group xml:base="cp:/catalog.xml">
    <rewriteURI uriStartString="foo:" rewritePrefix="cp:"/>
    <rewriteSystem systemIdStartString="foo:" rewritePrefix="cp:"/>
  </group>
  <group xml:base="file:/home/fake/catalog.xml" [1]>
    <rewriteURI uriStartString="bar:" rewritePrefix="cp:"/>
    <rewriteSystem systemIdStartString="bar:" rewritePrefix="cp:"/>
  </group>
</catalog>

Dependending on I have or not support for cp: protocol (first group
xml:base), the first xml:base (cp:/catalog.xml) is rewritten fo
file:cp:/catalog.xml. It is normal ? I can imagine that new
URI(xx).isAbsolute() is used to know if it should be absolutized (?).
That's strange, but, Ok, I can accept this...

Then, if cp: support is enabled, if I try to resolve
bar:/schemaBar/bar.rnc, it is resolved as cp:/schemaBar/bar.rnc, but
if I try to resolve foe:/schemaFoe/foe.rnc, it is resolved as null.

My question is : with rewriteSystem / rewriteURI, does the xml:base
may change the resolution ? In specification, xml:base is not
mentionned in
https://www.oasis-open.org/committees/entity/spec-2001-08-06.html#s.rewrite,
but it is said " If the value of the rewritePrefix attribute is
relative, it must be made absolute with respect to the base URI
currently in effect."  in
https://www.oasis-open.org/committees/entity/spec-2001-08-06.html#s.rewritesystem


My thought was that xml:base was used only to absolutized relatives
URI, and not absolute ones. Then, with Apache resolver, if I set debug
output ON, I get this while loading catalog :

Cannot find CatalogManager.properties
Parse catalog: ./xcatalog
Loading catalog: ./xcatalog
Default BASE:
file:////home/ext-cmarchand/devel/apache/xml-commons/xcatalog
Catalog does not exist:
file:////home/ext-cmarchand/devel/apache/xml-commons/xcatalog
Parse catalog: ../../github/jing-trang/cmarchand_test/catalog-bug.xml
Loading catalog:
../../github/jing-trang/cmarchand_test/catalog-bug.xml
Default BASE:
file:////home/ext-cmarchand/devel/github/jing-trang/cmarchand_test/catalog-bug.xml
xml:base: cp:/catalog.xml
BASE CUR:
file:////home/ext-cmarchand/devel/github/jing-trang/cmarchand_test/catalog-bug.xml
BASE STR: cp:/catalog.xml
BASE NEW: cp:/catalog.xml
rewriteURI: foo:
    cp:
REWRITE_URI: foo:
    cp:/catalog.xml
rewriteSystem: foo:
    cp:
REWRITE_SYSTEM: foo:
    cp:/catalog.xml
(reset) xml:base:
file:////home/ext-cmarchand/devel/github/jing-trang/cmarchand_test/catalog-bug.xml
BASE CUR: cp:/catalog.xml
BASE STR:
file:////home/ext-cmarchand/devel/github/jing-trang/cmarchand_test/catalog-bug.xml
BASE NEW:
file:////home/ext-cmarchand/devel/github/jing-trang/cmarchand_test/catalog-bug.xml
xml:base: file:/home/fake/catalog.xml
BASE CUR:
file:////home/ext-cmarchand/devel/github/jing-trang/cmarchand_test/catalog-bug.xml
BASE STR: file:/home/fake/catalog.xml
BASE NEW: file:/home/fake/catalog.xml
rewriteURI: bar:
    cp:
REWRITE_URI: bar:
    cp:
rewriteSystem: bar:
    cp:
REWRITE_SYSTEM: bar:
    cp:
(reset) xml:base:
file:////home/ext-cmarchand/devel/github/jing-trang/cmarchand_test/catalog-bug.xml
BASE CUR: file:/home/fake/catalog.xml
BASE STR:
file:////home/ext-cmarchand/devel/github/jing-trang/cmarchand_test/catalog-bug.xml
BASE NEW:
file:////home/ext-cmarchand/devel/github/jing-trang/cmarchand_test/catalog-bug.xml

We can see the REWRITE_SYSTEM are not processed the same with
different xml:base.

I will enjoy any help to locate the problem (my code, my catalog, or
Apache Resolver)...

Thanks in advance,
Christophe


Links:
------
[1] file:/home/fake/catalog.xml

• References:
  • Catalogs, rewriteURI and xml:base
    • From: Christophe Marchand <cmarchand@oxiane.com>