Data Type - boolean

Datatype: boolean

Found in http://www.posc.org/schemas/useful_types.xsd
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Description:

True or False. XML Schema has a boolean data type, which accepts values of (true, false). This datatype extends the possibilities to other case modes. For exampe, true, True, TRUE are all acceptable.

Proposed Usage:

This datatype was developed to support the Epicentre boolean data type. Its intended usage is shown in the PEF boolean element document. Usage as a useful datatype is shown in the following sample usage schema and sample XML.

XML Schema:

The schema and examples do not explicitly show the lines that set the namespaces.

All schema examples will use xsd: as the namespace for the schema tags and datatypes, and null for all the locally generated namespaces.

XML Examples will exclude namespace modifiers for clarity. Actual XML will probably need namespaces.

<xsd:simpleType name="xsd:boolean">
  <xsd:restriction base="xsd:string">
    <xsd:enumeration value="true"/>
    <xsd:enumeration value="True"/>
    <xsd:enumeration value="TRUE"/>
    <xsd:enumeration value="false"/>
    <xsd:enumeration value="False"/>
    <xsd:enumeration value="FALSE"/>
  </xsd:restriction>
</xsd:simpleType>

Sample Usage Schema:

This datatype implies that the application must be able to accept the various case alternatives of true and false. If only {true, false} are to be acceptable, use the schema boolean datatype.

This datatype alone contains no elements. All namespace requirements will be derived from the schema that includes this file. The following uses unqualified.

   <xsd:element name="someFlag" type="boolean"/>

Sample XML:

   <someFlag>True</someFlag>