Novell NETWARE 6-DOCUMENTATION Manual page 2104

Using the &filter Query Parameter
&query=software+patches&filter=%2FProducts%3DProduct257&filter=%2FProducts%3D
Product16&filter=%2FProducts%3DProduct302
The &filter query parameter allows Web Search administrators to enhance
searches by adding hidden, additional query details when users submit a
search query. This is an enhancement over previous versions of Web Search,
which required that you use JavaScript to add additional details to search
queries.
The &filter query parameter works just like the &query= parameter and can
be used together using the optional number (#) value. For example, if the
query parameter was &query0=search_criteria, the matching filter parameter
would be &filter0=additional_hidden_search_criteria. This allows the
multiple weighted queries feature to work as designed while allowing
administrators to add additional query details to each query.
Unlike the &query parameter, the &filter parameter can be sent multiple
times. For example, if users search for software patches, you could include the
various products to be searched, which could then improve search time and
accuracy:
query=software patches
filter=/Products=Product257
filter=/Products=Product16
filter=/Products=Product302
The resultant URL might appear as follows, but with the HTTP and domain
name prefix:
NOTE:
All &filter operators are combined using default the &operator=value, AND.
Also, the default Boolean conjunction joining the various filter operators is an OR
search. You can change the default Boolean conjunction by using the
&filteroperator=# query parameter. The pound sign (#) here acts just like the one
used in the #operator=# query parameter.
Optimizing Search Results 175