| Purpose |
This element establishes a connection between a schema and a shadow function in order to improve the integration of non-XML data in Tamino. A shadow document contains an XML representation which is generated from the non-XML data by the shadow function. Therefore a shadow document can be accessed using X-Query or XQuery, just as XML data are accessed. This technique allows efficient indexing of non-XML data. A shadow function is just a special kind of
Server
Extension. Depending on whether it caters for text data
or binary data, this shadow function can be defined using the
For more information on shadow functions, see:
|
| Parent element | |
| Child elements | tsd:onBinaryInsert,
tsd:onTextInsert,
tsd:storeShadowOnly |
| Attributes | None |
| Restrictions | At least one of the child elements
tsd:onBinaryInsert
or tsd:onTextInsert
must be present.
|
This example illustrates the definition of an index for non-XML data using a shadow document that is maintained by the Server Extensions SXSBinaryIndexer.put and SXSTextIndexer.put in TSD:
<?xml version="1.0" encoding="windows-1252"?>
<xs:schema elementFormDefault="qualified"
xmlns:tsd="http://namespaces.softwareag.com/tamino/TaminoSchemaDefinition"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:annotation>
<xs:appinfo>
<tsd:schemaInfo name="nox">
<tsd:collection name="nox" />
<tsd:doctype name="nox">
<tsd:nonXML>
<tsd:shadowXML>
<tsd:onBinaryInsert>SXSBinaryIndexer.put</tsd:onBinaryInsert>
<tsd:onTextInsert>SXSTextIndexer.put</tsd:onTextInsert>
</tsd:shadowXML>
</tsd:nonXML>
</tsd:doctype>
</tsd:schemaInfo>
</xs:appinfo>
</xs:annotation>
<xs:element name="blob">
.
.
.
</xs:element>
</xs:schema>
