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Const (TCP/IP)

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The TCP/IP Const construct defines the data type and value that must be returned. Const is used for elements that do not change in value. The Const construct is defined in Tcpbidi.xsd.

Attribute Description
name The name of the schema value.
type The type of data in the value attribute, a value in the BIDI_TYPE enumeration.
value A string that contains the constant value.

Code example

The following code example extends the bidi communications schema by adding an Extension property to the Printer property, and a Version property to the Extension property. In the example, Extension contains a constant value entry, Category. Also, Version has two constant value entries, Major and Minor.

<Property name="Printer">
  <Property name="Extension">
    <Const name="Category" type="BIDI_STRING" value="Extension"/>
    <Property name="Version">
      <Const name="Major" type="BIDI_INT" value="1"/>
      <Const name="Minor" type="BIDI_INT" value="0"/>
    </Property>
  </Property>
</Property>

The preceding example results in the following queries:

\Printer.Extension:Category
\Printer.Extension.Version:Major
\Printer.Extension.Version:Minor