.. _hooks-flex-id:
-Flexible Identifier: Easier Management of Host Reservations
-===========================================================
+``flex_id``: Flexible Identifier for Host Reservations
+======================================================
The Kea software provides a way to handle
host reservations that include addresses, prefixes, options, client
several options and fields to uniquely identify a client. Those
scenarios are addressed by the Flexible Identifiers hook application.
-The ``flex_id`` library is only available to ISC customers with a paid support
+The Flexible Identifier library is only available to ISC customers with a paid support
contract.
.. note::
This library can only be loaded by the ``kea-dhcp4`` or ``kea-dhcp6``
process.
-The library allows the definition of an expression, using notation initially
+The ``flex_id`` library allows the definition of an expression, using notation initially
used only for client classification. (See
:ref:`classification-using-expressions` for a detailed description of
the syntax available.) One notable difference is that for client