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PDFlib TET PDF IFilter 4.0 Manual

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3.7 Metadata in Windows Search<br />

Create a property description file. Windows Search accesses the Windows property<br />

system which holds descriptions of predefined and custom metadata properties. In order<br />

to use custom metadata properties with Windows Search you must prepare a property<br />

description file (often called .propdesc) which specifies the names, data types, and<br />

GUIDs of properties, as well as other property attributes. The property descriptions<br />

must match the corresponding property descriptions in the XML configuration file.<br />

Property descriptions must be specified as XML files according to the syntax described<br />

at the following location:<br />

msdn.microsoft.com/en-us/library/bb773879(VS.85).aspx<br />

Sample property description files are installed with <strong>TET</strong> <strong>PDF</strong> <strong>IFilter</strong>. The following (incomplete)<br />

example demonstrates a few property descriptions:<br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

Note that the multipleValues="true" attribute is crucial for multivalued properties (see<br />

Section 3.5, »Multivalued Properties«, page 44).<br />

Predefined properties. A property description file predefined_properties.propdesc for all<br />

predefined properties (see Appendix A, »Predefined Metadata Properties«) is installed<br />

with <strong>TET</strong> <strong>PDF</strong> <strong>IFilter</strong>. Although the property definitions are built into <strong>TET</strong> <strong>PDF</strong> <strong>IFilter</strong>,<br />

you must enable the desired property set collections in the XML configuration file (see<br />

Section 3.3, »Predefined Metadata Properties«, page 41), and register the property descriptions<br />

(see »Register metadata properties in Windows«, page 47) before you can use<br />

them in queries.<br />

XML configuration for Windows Search. Table 3.3 lists requirements and recommendations<br />

related to the XML configuration for <strong>TET</strong> <strong>PDF</strong> <strong>IFilter</strong> when working with Windows<br />

Search.<br />

Register metadata properties in Windows. In order to use property queries in Windows<br />

Search the corresponding property descriptions must be registered in the Windows<br />

property system. You can register property descriptions with the command-line<br />

program registerpropdesc.exe which is installed with <strong>TET</strong> <strong>PDF</strong> <strong>IFilter</strong>. Note that this tool<br />

works only if Windows Search is installed on the system. Supply the file name of a property<br />

description file to this tool to register it with the Windows property system (make<br />

sure to enclose the path with double quotes if it contains space characters):<br />

3.7 Metadata in Windows Search 47

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