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RelaxNG (rnc) schema for XHTML extension

I would like to edit the XHTML files using Emacs nxml-mode , which rnc can use to check on the fly. All of this is built into newer versions of Emacs.

However, my XHTML files contain elements from a different schema. So the <foo: foo> tags are valid, but only inside the <xhtml: head> document.

Currently, nxml is complaining because the XHTML scheme it uses does not describe the foo tag. How to create a new schema that describes the foo tag with respect to an existing XHTML schema, and how can I automatically apply this schema using the schema definition rules in the schemas.xml file?

ie: I would like to test a document using two schemes at the same time: XHTML built-in rules and some custom rules that add specific tags with a name extension.

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3 answers

Validator.nu has a predefined schema that is modified from the XHTML schema set originally developed by James Clark, and one of the add-ons is rdf: RDF in the head, so the schema can be useful for learning.

(I have no experience with problems placing the schema in nxml format).

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1: , , , "" , /, 9.2 RelaxNG. .

2: ; nxml-mode "schemas.xml", . , xml:

<?xml version='1.0'?>
<locatingRules xmlns="http://thaiopensource.com/ns/locating-rules/1.0">
  <uri resource="auto.xml" uri="lab.rnc"/>
</locatingRules>

"auto.xml" "lab.rnc".

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W3C . , rng XHTML + RDFa:

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- XHTML+RDFa 1.0 -->

<grammar ns="http://www.w3.org/1999/xhtml"
         xmlns="http://relaxng.org/ns/structure/1.0"
         datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">

<include href="xhtml-datatypes-1.rng"/>
<include href="xhtml-attribs-1.rng"/>
<include href="xhtml-text-1.rng"/>
<include href="xhtml-list-1.rng"/>
<include href="xhtml-object-1.rng"/>
<include href="xhtml-pres-1.rng"/>
<include href="xhtml-edit-1.rng"/>
<include href="xhtml-bdo-1.rng"/>
<include href="xhtml-form-1.rng"/>
<include href="xhtml-table-1.rng"/>
<include href="xhtml-image-1.rng"/>
<include href="xhtml-ssismap-1.rng"/>
<include href="xhtml-events-1.rng"/>
<include href="xhtml-inlstyle-1.rng"/>
<include href="xhtml-base-1.rng"/>
<include href="xhtml-ruby-1.rng"/>
<include href="xhtml-metaAttributes-1.rng"/>

<define name="xhtml.Common.attrib" combine="interleave">
  <optional>
    <attribute name="href">
      <ref name="xhtml.URI.datatype"/>
    </attribute>
  </optional>
  <ref name="xhtml.Metainformation.attrib"/>
</define>

<include href="xhtml-hypertext-1.rng">
    <define name="xhtml.a.attlist">
      <ref name="xhtml.Common.attrib"/>
      <optional>
        <attribute name="charset">
          <ref name="xhtml.Charset.datatype"/>
        </attribute>
      </optional>
      <optional>
        <attribute name="type">
          <ref name="xhtml.ContentType.datatype"/>
        </attribute>
      </optional>
      <optional>
        <attribute name="hreflang">
          <ref name="xhtml.LanguageCode.datatype"/>
        </attribute>
      </optional>
      <optional>
        <attribute name="accesskey">
          <ref name="xhtml.Character.datatype"/>
        </attribute>
      </optional>
      <optional>
        <attribute name="tabindex">
          <ref name="xhtml.Number.datatype"/>
        </attribute>
      </optional>
    </define>
</include>

<include href="xhtml-link-1.rng">
    <define name="xhtml.link.attlist">
      <ref name="xhtml.Common.attrib"/>
      <optional>
        <attribute name="charset">
          <ref name="xhtml.Charset.datatype"/>
        </attribute>
      </optional>
      <optional>
        <attribute name="hreflang">
          <ref name="xhtml.LanguageCode.datatype"/>
        </attribute>
      </optional>
      <optional>
        <attribute name="type">
          <ref name="xhtml.ContentType.datatype"/>
        </attribute>
      </optional>
      <optional>
        <attribute name="media">
          <ref name="xhtml.MediaDesc.datatype"/>
        </attribute>
      </optional>
    </define>
</include>

<include href="xhtml-meta-1.rng">
    <define name="xhtml.meta.attlist">
      <ref name="xhtml.Common.attrib"/>
      <optional>
        <attribute name="http-equiv">
          <data type="NMTOKEN"/>
        </attribute>
      </optional>
      <optional>
        <attribute name="name">
          <data type="NMTOKEN"/>
        </attribute>
      </optional>
      <optional>
        <attribute name="scheme">
          <text/>
        </attribute>
      </optional>
    </define>
</include>

<include href="xhtml-script-1.rng">
    <define name="xhtml.script.attlist">
      <ref name="xhtml.id.attrib"/>
      <ref name="xhtml.Metainformation.attrib"/>
      <optional>
        <attribute name="href">
          <ref name="xhtml.URI.datatype"/>
        </attribute>
      </optional>
      <optional>
        <attribute name="charset">
          <ref name="xhtml.Charset.datatype"/>
        </attribute>
      </optional>
      <attribute name="type">
        <ref name="xhtml.ContentType.datatype"/>
      </attribute>
      <optional>
        <attribute name="src">
          <ref name="xhtml.URI.datatype"/>
        </attribute>
      </optional>
      <optional>
        <attribute name="defer">
          <value>defer</value>
        </attribute>
      </optional>
      <optional>
        <attribute name="xml:space">
          <value>preserve</value>
        </attribute>
      </optional>
    </define>
</include>

<include href="xhtml-style-1.rng">
    <define name="xhtml.style.attlist">
      <ref name="xhtml.title.attrib"/>
      <ref name="xhtml.I18n.attrib"/>
      <ref name="xhtml.id.attrib"/>
      <ref name="xhtml.Metainformation.attrib"/>
      <optional>
        <attribute name="href">
          <ref name="xhtml.URI.datatype"/>
        </attribute>
      </optional>
      <attribute name="type">
        <ref name="xhtml.ContentType.datatype"/>
      </attribute>
      <optional>
        <attribute name="media">
          <ref name="xhtml.MediaDesc.datatype"/>
        </attribute>
      </optional>
      <!-- <optional>
        <attribute name="xml:space">
          <value>preserve</value>
        </attribute>
      </optional> -->
    </define>
</include>

<include href="xhtml-csismap-1.rng">
    <define name="xhtml.area.attlist">
      <ref name="xhtml.Common.attrib"/>
      <ref name="xhtml.shape.attrib"/>
      <ref name="xhtml.coords.attrib"/>
      <optional>
        <attribute name="nohref">
          <value>nohref</value>
        </attribute>
      </optional>
      <attribute name="alt">
        <ref name="xhtml.Text.datatype"/>
      </attribute>
      <optional>
        <attribute name="tabindex">
          <ref name="xhtml.Number.datatype"/>
        </attribute>
      </optional>
      <optional>
        <attribute name="accesskey">
          <ref name="xhtml.Character.datatype"/>
        </attribute>
      </optional>
    </define>
</include>

<include href="xhtml-param-1.rng">
    <define name="xhtml.param.attlist">
      <ref name="xhtml.id.attrib"/>
      <ref name="xhtml.Metainformation.attrib"/>
      <optional>
        <attribute name="href">
          <ref name="xhtml.URI.datatype"/>
        </attribute>
      </optional>
      <attribute name="name"/>
      <optional>
        <attribute name="value"/>
      </optional>
      <optional>
        <attribute name="valuetype">
          <choice>
        <value>data</value>
        <value>ref</value>
        <value>object</value>
          </choice>
        </attribute>
      </optional>
      <optional>
        <attribute name="type">
          <ref name="xhtml.ContentType.datatype"/>
        </attribute>
      </optional>
    </define>
</include>

<include href="xhtml-struct-1.rng">
    <define name="xhtml.title.attlist">
      <ref name="xhtml.Common.attrib"/>
    </define>

    <define name="xhtml.head.attlist">
      <ref name="xhtml.Common.attrib"/>
      <ref name="xhtml.profile.attlist"/>
    </define>

    <define name="xhtml.html.attlist">
      <ref name="xhtml.XHTML.version.attrib"/>
      <ref name="xhtml.Common.attrib"/>
    </define>
</include>

</grammar>

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Source: https://habr.com/ru/post/1699492/

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