XML Examples tutorial
Freetext indexing hooks Building a freetext index using a custom PL indexing hooks

## Freetext Index

- The freetext index has a default mechanism for indexing and unindexing.
- By default indexing/unindexing is performed over data column.
- A custom PL hook can be made for indexing/unindexing, and be associated to the freetext index definition.
- The data from additional columns can be indexed in the custom PL hooks.
- Working together with off-band data columns to make index sensitive to changes in the additional columns data they should be declared as off-band data.

## Example

The example SQL script does the following steps:

- Definition of the hooks
- Making of text index