XML Importer

The XML importer reads sample XML documents and guesses at implicit schema definitions, based on those documents. When the suffix xml is used, Relaxer uses the XML importer.

Example

List 4.3.1.1[hello.xml] is a sample XML document.

<greeting to="everybody" from="relaxer.org" date="2001-02-10">
  <title>Hello World</title>
  <message>Welcome to Relaxer World!</message>
</greeting>

To import an XML document, simply specifies an XML document file as follows:

$ relaxer -rng hello.xml

As a result, Relaxer generates one file, as follows:

• hello.rng

List 4.3.1.2[hello.rng] is the generated RELAX NG schema, which is avilable for an XML document 'hello.xml'.

<?xml version="1.0" encoding="UTF-8" ?>
<grammar datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes" \
    xmlns="http://relaxng.org/ns/structure/1.0" \
    xmlns:java="http://www.relaxer.org/xmlns/relaxer/java" \
    xmlns:jdbc="http://www.relaxer.org/xmlns/relaxer/jdbc" \
    xmlns:relaxer="http://www.relaxer.org/xmlns/relaxer">
  <start>
    <ref name="greeting"/>
  </start>
  <define name="greeting">
    <element name="greeting">
      <attribute name="date">
        <data type="date"/>
      </attribute>
      <attribute name="from">
        <data type="token"/>
      </attribute>
      <attribute name="to">
        <data type="token"/>
      </attribute>
      <element name="title">
        <data type="token"/>
      </element>
      <element name="message">
        <data type="token"/>
      </element>
    </element>
  </define>
</grammar>

Example2

List 4.3.2.1[hello.xml] is the sample XML document using previous example.

<greeting to="everybody" from="relaxer.org" date="2001-02-10">
  <title>Hello World</title>
  <message>Welcome to Relaxer World!</message>
</greeting>

List 4.3.2.2[hello2.xml] is an another sample XML document.

<greeting to="everybody" from="relaxer.org">
  <title>Hello World</title>
  <subtitle>Initial application</subtitle>
  <message>Welcome to Relaxer World!</message>
</greeting>

Relaxer can generate a RELAX schema from multiple XML documents. To import multiple XML documents, simply specifies schema files as follows:

$ relaxer -rng hello.xml hello2.xml

As a result, Relaxer generates one file, as follows:

• hello.rng

List 4.3.2.3[hello.rng] is the generated RELAX NG schema, which is avilable for XML documents 'hello.xml' and 'hello2.xml'.

<?xml version="1.0" encoding="UTF-8" ?>
<grammar datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes" \
    xmlns="http://relaxng.org/ns/structure/1.0" \
    xmlns:java="http://www.relaxer.org/xmlns/relaxer/java" \
    xmlns:jdbc="http://www.relaxer.org/xmlns/relaxer/jdbc" \
    xmlns:relaxer="http://www.relaxer.org/xmlns/relaxer">
  <start>
    <ref name="greeting"/>
  </start>
  <define name="greeting">
    <element name="greeting">
      <optional>
        <attribute name="date">
          <data type="date"/>
        </attribute>
      </optional>
      <attribute name="from">
        <data type="token"/>
      </attribute>
      <attribute name="to">
        <data type="token"/>
      </attribute>
      <element name="title">
        <data type="token"/>
      </element>
      <optional>
        <element name="subtitle">
          <data type="token"/>
        </element>
      </optional>
      <element name="message">
        <data type="token"/>
      </element>
    </element>
  </define>
</grammar>