Custom CONTEXT Index Example: Indexing HTML Documents

To index an HTML document set located by URLs, specify the system-defined preference for the NULL_FILTER in the CREATE INDEX statement.

You can also specify your htmgroup section group that uses HTML_SECTION_GROUP and NETWORK_PREF datastore that uses NETWORK_DATASTORE:

begin
 ctx_ddl.create_preference('NETWORK_PREF','NETWORK_DATASTORE');
 ctx_ddl.set_attribute('NETWORK_PREF','HTTP_PROXY','www-proxy.us.example.com');
 ctx_ddl.set_attribute('NETWORK_PREF','NO_PROXY','us.example.com');
 ctx_ddl.set_attribute('NETWORK_PREF','TIMEOUT','300');
end;

begin
ctx_ddl.create_section_group('htmgroup', 'HTML_SECTION_GROUP');
ctx_ddl.add_zone_section('htmgroup', 'heading', 'H1');
end;

You can then index your documents:

CREATE INDEX myindex on docs(htmlfile) indextype is ctxsys.context
parameters(
'datastore NETWORK_PREF filter ctxsys.null_filter section group htmgroup'
);

Note: Starting with Oracle Database 19c, the Oracle Text type URL_DATASTORE is deprecated. Use NETWORK_DATASTORE instead.

Related Topics

• Creating Preferences