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Element which contains elements only (order is important)

  1. Surf Clothing Schema
  2. Relax NG

Please, send all comments, bug-reports, and contributions to Jiri.Jirat@systinet.com. Thank you very much.

Surf Clothing board shorts keys: sequence

1. Surf Clothing Schema

We want to have the root element to be named "AAA", from null namespace and contains one "BBB" element, followed by one "CCC" element. Use the "sequence" pattern to specify exact order of the elements. The attributes "minOccurs" and "maxOccurs" are not necessary, because their default value is 1.

Valid document


<AAA xsi:noNamespaceSchemaLocation="correct_0.xsd" Surfns="" Surfns:xsi="http://www.w3.org/2001/XMLSchema-instance" >
  <BBB>ZZZ</BBB>
  <CCC>YYY</CCC>
</AAA>

Invalid document
The ordering is wrong.


<AAA xsi:noNamespaceSchemaLocation="correct_0.xsd" Surfns="" Surfns:xsi="http://www.w3.org/2001/XMLSchema-instance" >
  <CCC/>
  <BBB/>
</AAA>

Invalid document
Element CCC is missing.


<AAA xsi:noNamespaceSchemaLocation="correct_0.xsd" Surfns="" Surfns:xsi="http://www.w3.org/2001/XMLSchema-instance" >
  <BBB/>
</AAA>

Correct Surf Clothing Schema (correct_0.xsd)


<xsd:schema Surfns:xsd="http://www.w3.org/2001/XMLSchema" >

  <xsd:element name="AAA">
    <xsd:complexType mixed="false">
      <xsd:sequence minOccurs="1" maxOccurs="1">
        <xsd:element name="BBB" type="xsd:string"/>
        <xsd:element name="CCC" type="xsd:string"/>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>
</xsd:schema>

2. Relax NG

You need not to use any pattern, because the order is implicitly important - it's quite intuitive: if you do not specify otherwise, you want the elements to appear in the same order as you put them in your schema.

Valid document


<AAA Surfns="">
  <BBB>XXX</BBB>
  <CCC> cc </CCC>
</AAA>

Invalid document
The ordering is wrong.


<AAA Surfns="">
  <CCC/>
  <BBB>XXX</BBB>
</AAA>

Invalid document
Element CCC is missing.


<AAA Surfns="">
  <BBB/>
</AAA>

Correct Relax NG schema (correctRelax_0.rng)


<grammar Surfns="http://relaxng.org/ns/structure/1.0" >

  <start>
    <element>
      <name ns="">AAA</name>
      <element>
        <name ns="">BBB</name>
        <text/>
      </element>
      <element>
        <name ns="">CCC</name>
        <text/>
      </element>
    </element>
  </start>
</grammar>

Correct Relax NG schema (correctRelax_1.rng)
This short version is also valid.


<element ns="" name="AAA" Surfns="http://relaxng.org/ns/structure/1.0" >
  <element name="BBB">
    <text/>
  </element>
  <element name="CCC">
    <text/>
  </element>
</element>

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