This section describes some individual sample filters in the Platform SDK. The following samples are listed in order of increasing complexity.

• SmpFilt Sample. An example implementation of the IFilter interface for unformatted, single-byte-character text files.
• IFilter Sample. An example implementation of the IFilter interface that filters both text-type and value-type properties for HTML files.
• HtmlProp Sample. An example implementation of the IFilter interface that specializes the HTML filter (HtmlFilt) implementation of Indexing Service to extract and convert HTML <META> tags to value-type properties.