Problematic DTD's #79
Description
Docbook-DTD customization is inevitable for large projects.
In DTD customization, ENTITYs can be customized, while ELEMENTs that are not wrapped with ENTITYs cannot. In the latter case, it will no longer be the standard DocBook DTD as the ELEMENTs to be modified are wrapped with ENTITYs.
As a result, there is no choice but to hack the DTD. Then we can make the DocBook DTD our own DTD by placing the original copyright and license information at the beginning of the file, specifying the copyrights associated with the modification and that it is a derivative, and start adding the changes required by our document tree to the DTD.
As for the RELAX-NG/DTD application,
· DTD's conformity to the document tree (xmllint),
· conformance of the document tree to DTD (xmllint), and
· conformity of document tree to RNG (jing)
needs to be tested. The last two alone cannot catch all errors.
That is, it is necessary to generate an RNG from DTD (trang).
After all, it is clear that the PDF generation tools prepared for the standard DocBook-DTD cannot be used.