Bug#519592: fop: picks wrong title language for metadata

[brian m. carlson]

Package: fop
Version: 1:0.95.dfsg-4
Severity: normal

When I specify RDF metadata in my XSL-FO file, I can specify several
different dc:title tags, each with a different xml:lang tag (or none at
all).  If I specify

   <rdf:Description rdf:about="" xmlns:dc="http://purl.org/dc/elements/1.1/">
     <dc:title>An Orange in Flight</dc:title>
     <dc:title xml:lang="x-default">An Orange in Flight</dc:title>
     <dc:title xml:lang="en">An Orange in Flight</dc:title>
     <dc:title xml:lang="es">Una Naranja en Vuelo</dc:title>
     <dc:creator>The Barefoot Waif</dc:creator>
   </rdf:Description>

fop chooses the last title, even though the language for the XSL-FO
document is "en".  The XMP metadata (as well as the /Info data) in the
PDF comes out as

   <dc:title>
   <rdf:Alt>
   <rdf:li xml:lang="x-default">Una Naranja en Vuelo</rdf:li>
   </rdf:Alt>
   </dc:title>

which is completely wrong.

Obviously, I want it to pick one of the other three.  My preference is
that fop picks the tag without an xml:lang attribute; then the tag with
xml:lang="x-default"; then the tag with the language of the document,
according to the language attribute on an enclosing fo element; and then
some other language (which one I don't care).

This doesn't happen if dc:title contains an rdf:Alt with rdf:li elements
that have xml:lang attributes, as the XMP specification requires.
However, the fop page on metadata[0] demonstrates metadata that does not
comply with the XMP standard, so it is reasonable to assume that fop
will properly fix up metadata that isn't strictly conforming.

[0] http://xmlgraphics.apache.org/fop/0.95/metadata.html

-- System Information:
Debian Release: squeeze/sid
   APT prefers unstable
   APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.29-rc7-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages fop depends on:
ii  default-jre [java2-runti 1.5-31          Standard Java or Java compatible R
ii  java-gcj-compat [java2-r 1.0.80-1        Java runtime environment using GIJ
ii  java-wrappers            0.1.13          wrappers for java executables
ii  libavalon-framework-java 4.2.0-4         Common framework for Java server a
ii  libbatik-java            1.7-2           xml.apache.org SVG Library
ii  libbsf-java              1:2.4.0-2       Bean Scripting Framework to suppor
ii  libcommons-io-java       1.4-1           Common useful IO related classes
ii  libcommons-logging-java  1.1.1-2         commmon wrapper interface for seve
ii  libxalan2-java           2.7.1-2         XSL Transformations (XSLT) process
ii  libxerces2-java          2.9.1-2         Validating XML parser for Java wit
ii  libxml-commons-external- 1.3.04-2        XML Commons external code - DOM, S
ii  libxmlgraphics-commons-j 1.3.1.dfsg-2    reusable components used by Batik 
ii  libxp6                   1:1.0.0.xsf1-2  X Printing Extension (Xprint) clie
ii  libxt6                   1:1.0.5-3       X11 toolkit intrinsics library
ii  libxtst6                 2:1.0.3-1       X11 Testing -- Resource extension 
ii  openjdk-6-jre [java2-run 6b14-1.5~pre1-3 OpenJDK Java runtime, using Hotspo

Versions of packages fop recommends:
ii  libsaxon-java                 1:6.5.5-5  The Saxon XSLT Processor

Versions of packages fop suggests:
ii  fop-doc                    1:0.95.dfsg-4 Documentation for fop
ii  libservlet2.4-java         5.0.30-8      Servlet 2.4 and JSP 2.0 Java class

-- no debconf information

-- 
brian m. carlson / brian with sandals: Houston, Texas, US
+1 713 440 7475 | http://crustytoothpaste.ath.cx/~bmc | My opinion only
troff on top of XML: http://crustytoothpaste.ath.cx/~bmc/code/thwack
OpenPGP: RSA v4 4096b 88AC E9B2 9196 305B A994 7552 F1BA 225C 0223 B187
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