Filtering Text and Properties

Note

Indexing Service is no longer supported as of Windows XP and is unavailable for use as of Windows 8. Instead, use Windows Search for client side search and Microsoft Search Server Express for server side search.

 

Indexing Service uses the IFilter interface to scan documents for text and property information. This section includes the following topics:

• Filtering Information Chunks. Chunks are the fundamental units of information that can be either contents or properties of an object.
• Filtering File Contents. A filter extracts chunks of text from the contents of a file to index them.
• Filtering File Properties. A filter extracts chunks of text from a file's properties to index them.
• Filtering Well-Known Properties. A filter can extract a consistent set of well-known properties for all files.

Several samples of IFilter interface implementations can be found in subdirectories of the mssdk\samples\winbase\indexing directory of the Platform SDK. To install the samples, see Installing the Samples. For more information about the samples, see Filter Samples.