Added possibility to treat some content as artifact.
If any fo:static-content or fo:wrapper element has their 'role' property set to 'artifact', then they and their descendants will be treated as artifacts.
Suggested by Martin Koegler as part of Bugzilla #50852
git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1343632 13f79535-47bb-0310-9956-ffa450edef68
Associate structure tree elements directly to render content
* Defer the binding of PCData to struct elems using a placeholder mechanism.
* Translate text nodes to marked-content sequences in IF structure tree.
* Replace ptr with structure tree element.
* Re-order table footers so they appear at the end of the structure tree.
git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/Temp_ImproveAccessibility@1236718 13f79535-47bb-0310-9956-ffa450edef68