Step 1 Create the CONTEXT index

Index the HTML files by creating a CONTEXT index on the text column as follows. Because you are indexing HTML, this example uses the NULL_FILTER preference type for no filtering and the HTML_SECTION_GROUP type:

CREATE INDEX idx_docs ON docs(text)
     INDEXTYPE IS CTXSYS.CONTEXT PARAMETERS
     ('FILTER CTXSYS.NULL_FILTER SECTION GROUP CTXSYS.HTML_SECTION_GROUP');

Use the NULL_FILTER, because you do not need to filter HTML documents during indexing. However, if you index PDF, Microsoft Word, or other formatted documents, then use the CTXSYS.AUTO_FILTER (the default) as your FILTER preference.

This example also uses the HTML_SECTION_GROUP section group, which is recommended for indexing HTML documents. Using HTML_SECTION_GROUP enables you to search within specific HTML tags and eliminates from the index unwanted markup such as font information.