Topic:
<ISINDEX> indicates that the browser client should allow index searches with keywords. This function requires background programming, please refer to W3 Org's Queries and Indexes.
None.
<ISINDEX> is legal within:
<BLOCKQUOTE> <BODY> <DD> <FORM> <HEAD> <LI>
No markup can be used within <ISINDEX>
Long, complex documents typically benefit from being searchable, but any kind of document with large numbers of terms or details (for example the HTML specifications or the IETF's RFCs) can benefit from <ISINDEX> support.