standard_names_v1_0.xsd

<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>

<xs:schema elementFormDefault="qualified"
           xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <!-- identifier types -->

  <xs:simpleType name="standard_name_type">
    <xs:restriction base="xs:string">
      <xs:pattern value="[a-z][a-z0-9_]*"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="type_type">
    <xs:restriction base="xs:string">
      <xs:pattern value="[iI][nN][tT][eE][gG][eE][rR]"/>
      <xs:pattern value="[rR][eE][aA][lL]"/>
      <xs:pattern value="[lL][oO][gG][iI][cC][aA][lL]"/>
      <xs:pattern value="[cC][hH][aA][rR][aA][cC][tT][eE][rR]"/>
      <xs:pattern value="[dD][oO][uU][bB][lL][eE][ ]*[pP][rR][eE][cC][iI][sS][iI][oO][nN]"/>
      <xs:pattern value="[cC][oO][mM][pP][lL][eE][xX]"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="version_type">
    <xs:restriction base="xs:string">
      <xs:pattern value="[1-9][0-9]*[.][0-9]+"/>
    </xs:restriction>
  </xs:simpleType>

  <!-- attributes -->

  <xs:attribute name="comment"        type="xs:string"/>
  <xs:attribute name="long_name"      type="xs:string"/>
  <xs:attribute name="kind"           type="xs:string"/>
  <xs:attribute name="name"           type="standard_name_type"/>
  <xs:attribute name="units"          type="xs:string"/>
  <xs:attribute name="version"        type="version_type"/>

  <!-- definition of complex types -->

  <xs:complexType name="md_type">
    <xs:simpleContent>
      <xs:extension base="type_type">
        <xs:attribute ref="kind"  use="optional"/>
        <xs:attribute ref="units" use="required"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>

  <xs:complexType name="stdname_type">
    <xs:sequence>
      <xs:element name="type"     type="md_type"/>
    </xs:sequence>
    <xs:attribute ref="name"      use="required"/>
    <xs:attribute ref="long_name" use="optional"/>
  </xs:complexType>

  <xs:complexType name="section_type">
    <xs:sequence>
      <xs:element name="standard_name" type="stdname_type"
                  minOccurs="1" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute ref="name"    use="required"/>
    <xs:attribute ref="comment" use="optional"/>
  </xs:complexType>

  <!-- definition of elements -->

  <xs:element name="section" type="section_type">
  </xs:element>

  <xs:element name="standard_names">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="section" minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:attribute name="name"    type="xs:string"    use="required"/>
      <xs:attribute name="version" type="version_type" use="required"/>
    </xs:complexType>
  </xs:element>

</xs:schema>