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DTD OASIS DocBook TC · 4.5

DocBook 4.5

DocBook 4.5 XML DTD

DocBook documents written before version 5: no namespace, DTD instead of RelaxNG.

Validate with this schema Try it with the example

About

Many manuals and Linux documentation sets are still DocBook 4.x. Version 4.5 is the last DTD release; DocBook 5 moved to a namespace and RelaxNG.

The DTD is modular; its modules and the ISO entity sets are included here.

Good to know

  • Entities from the DTD ( , © and the other ISO sets) are only known when the DTD is read while parsing, which the browser cannot do for a DOCTYPE that points at docbook.org. Use character references or the five XML entities.
  • The example is by xmlvalid.com.

Files

27 files · 434.9 KB

The validator loads all of these with their folder structure, so includes and imports resolve as published.

Example document

article.xml · 792 B · valid against this schema

View Open in validator

In CI and from code

The same schema by its name, docbook-4.5, through the API.

npx @xmlvalid/cli validate "**/*.xml" --schema docbook-4.5
- uses: xmlvalid/validate-action@v1
  with:
    files: "**/*.xml"
    schema: docbook-4.5
    api-key: ${{ secrets.XMLVALID_API_KEY }}
curl https://xmlvalid.com/api/v1/validations \
  -H "Authorization: Bearer $XMLVALID_API_KEY" \
  -F document={{ $schema->example ?? 'document.xml' }} -F schema=docbook-4.5

Free accounts get 100 API validations a month. On Pro, a URL monitor can check a published document against this schema every hour and email you when it breaks. More CI setups