<?xml version = "1.0" encoding = "utf-8"?>
<?xml-stylesheet href="/pool/rng_ht.xslt" type="application/xml"?>
<!-- file KLEIDER/web/src/kalender/tree.rng -->
<grammar
  xmlns   = "http://relaxng.org/ns/structure/1.0"
  xmlns:d = "http://herbaer.de/xmlns/20051201/doc"
  ns      = "http://herbaer.de/xmlns/20151222/tree/"
>

<info xmlns="http://herbaer.de/xmlns/20051201/doc">
  <title>tree.rng</title>
  <subtitle>Baumstruktur von Dokumenten mit Titeln und Verweisen</subtitle>
  <date>2015-12-22</date>
  <author>
    <personname>
      <firstname>Herbert</firstname>
      <surname>Schiemann</surname>
    </personname>
    <email>h.schiemann@herbaer.de</email>
  </author>
</info>

<define name = "foreign_att">
  <d:para>Attribute anderer XML-Namensräume</d:para>
  <zeroOrMore>
    <attribute>
      <anyName>
        <except>
          <nsName ns = ""/>
          <nsName ns = "http://herbaer.de/xmlns/20151222/tree/"/>
        </except>
      </anyName>
    </attribute>
  </zeroOrMore>
</define>

<define name = "anything">
  <d:para>Beliebiger Inhalt</d:para>
  <zeroOrMore>
    <choice>
      <element>
        <anyName/>
        <ref name = "anything"/>
      </element>
      <attribute>
        <anyName/>
      </attribute>
      <text/>
    </choice>
  </zeroOrMore>
</define>

<define name = "foreign_el">
  <d:para>Elemente anderer XML-Namensräume</d:para>
  <zeroOrMore>
    <element>
      <anyName>
        <except>
          <nsName ns = "http://herbaer.de/xmlns/20151222/tree/"/>
        </except>
      </anyName>
      <ref name = "anything"/>
    </element>
  </zeroOrMore>
</define>

<start>
  <ref name = "el_tree"/>
</start>

<define name = "el_tree">
  <d:para>Das Wurzelelement der Baumstruktur</d:para>
  <element name = "tree">
    <ref name = "foreign_att"/>
    <interleave>
      <ref name = "foreign_el"/>
      <ref name = "el_node"/>
    </interleave>
  </element>
</define><!-- el_tree -->

<define name = "el_node">
  <d:para>Ein Baumknoten</d:para>
  <element name = "node">
    <ref name = "foreign_att"/>
    <interleave>
      <ref name = "foreign_el"/>
      <optional>
        <ref name = "el_refbase"/>
      </optional>
      <optional>
        <ref name = "el_name"/>
      </optional>
      <ref name = "el_title"/>
      <zeroOrMore>
        <ref name = "el_node"/>
      </zeroOrMore>
      <optional>
        <ref name = "el_ref"/>
      </optional>
    </interleave>
  </element>
</define><!-- el_node -->

<define name = "el_refbase">
  <d:para>
Basis für relative Verweise (<d:tag class = "element">ref</d:tag>-Elemente)
im aktuellen Knoten und Unterknoten.
Der Wert ist ein relativer oder absoluter Verzeichnispfad.
  </d:para>
  <element name = "refbase">
    <data type = "simpleword"/>
  </element>
</define><!-- el_refbase -->

<define name = "el_name">
  <d:para>
Der Name eines Knotens.
Er kann zur Bildung einer Knoten-ID dienen.
Er soll unter den "Geschwistern" eindeutig sein.
  </d:para>
  <element name = "name">
    <data type = "simpleword"/>
  </element>
</define><!-- el_name -->

<define name = "el_title">
  <d:para>Der Titel eines Knotens</d:para>
  <element name = "title">
    <ref name = "foreign_att"/>
    <text/>
  </element>
</define><!-- el_title -->

<define name = "el_ref">
  <d:para>Ein relativer oder absoluter Dateipfad</d:para>
  <element name = "ref">
    <ref name = "foreign_att"/>
    <data type = "data"/>
  </element>
</define><!-- el_ref -->

</grammar>
<!-- end of file KLEIDER/web/src/kalender/tree.rng -->
