switch to standard bookmark elements

[Bob Stayton <bobs@sagehill.net>]

The XSL 1.0 standard did not have elements for PDF bookmarks, but the 
XSL 1.1 (dating from 2006) standard does.  Now it seems all XSL-FO 
processors support the standard fo:bookmark-tree and fo:bookmark 
elements.  That means the custom bookmark elements that had to be 
maintained for each processor can be turned off and the standard 
bookmark elements used.  Are there any objections to doing so?

I could leave in the disabled templates in case someone needs them for 
an old version of the FO processor or for their customization.  However, 
if you did use customized bookmarks, the next docbook-xsl release would 
require you to make some changes.

--
Bob Stayton
Sagehill Enterprises
bobs@sagehill.net