Security
When searching corporate data it is vital that users are only shown search results they are authorised to view – it's common for the introduction of a search engine to expose documents such as salary spreadsheets that should only be available to a select group of people.
For small collections of data it is often enough to group documents into several searchable collections, and then restrict access to these collections to groups of users. When the source data is large and complex, Flax can take account of existing security settings, for example via the LDAP protocol. Users who are not allowed to see a particular document should not even know it exists, so search results will omit documents where necessary.
