Using $value, @keyed_name, @type in a select attribute
Copy
The following example uses the property xp-document of type item where the data_source is Document. The Document ItemType has the properties name and description. In order to add name and description to the output of an AML request, you have to use $value to get access to the name and description properties of xp-document.
Query:
<Item type="Part" select="xp-document($value(name,description))" />Return:
<Item type="Part" id="%Part.ID%">
<xp-document keyed_name="xp_doc_keyed_name" type="Document">
<Item type="Document" …>
<name>...</name>
<description>...</description>
</Item>
</xp-document>
</Item>
If the names of properties of xp-document are specified without using $value, a null value is returned as shown here:
Query:
<Item type="Part" select="xp-document(@defined_as, name, description)" />Return:
<Item type="Part" id="%Part.ID%">
<xp-document keyed_name="xp_doc_keyed_name" type="Document" defined_as="..." is_null="0"/>
</Item>
Other Examples:
Query:
<Item type="Part" select="xp-document($value)" />Return:
<Item type="Part" id="%Part.ID%" …>
<xp-document keyed_name="xp_doc_keyed_name" type="Document">%Document.ID%</xp-document>
</Item>
Query:
<Item type="Part" select="xp-document($value(*))" />Return:
<Item type="Part" id="%Part.ID%" …>
<xp-document keyed_name="xp_doc_keyed_name" type="Document">
<Item type="Document" …>
... all document STANDARD properties ...
</Item>
</xp-document>
</Item>
Query:
<Item type="Part" select="xp-document(@defined_as, $value(*, xp-*))" />Return:
<Item type="Part" id="%Part.ID%" …>
<xp-document defined_as="class" keyed_name="xp_doc_keyed_name" type="Document">
<Item type="Document" …>
... all document STANDARD properties ...
... all document xProperties ...
</Item>
</xp-document>
</Item>