Description
CSD01:
The DocBook Schema Version 5.1.1
Committee Specification Draft 01
09 June 2021
https://docs.oasis-open.org/docbook/docbook/v5.1.1/csd01/docbook-v5.1.1-csd01.docx
https://docs.oasis-open.org/docbook/docbook/v5.1.1/csd01/docbook-v5.1.1-csd01.html
https://docs.oasis-open.org/docbook/docbook/v5.1.1/csd01/docbook-v5.1.1-csd01.pdf
Relax NG schemas: https://docs.oasis-open.org/docbook/docbook/v5.1.1/csd01/schemas/rng/
Schematron schema: https://docs.oasis-open.org/docbook/docbook/v5.1.1/csd01/schemas/sch/
https://docs.oasis-open.org/docbook/docbook/v5.1.1/csd01/schemas/catalog.xml
https://docs.oasis-open.org/docbook/docbook/v5.1.1/csd01/schemas/docbook.nvdl