Check XML Expression from Library Entity
========================================

.. code-block:: http

    /api/repositories/{repository}/library/entities/{libraryID}/checkxmlexpressionfromentity

.. csv-table::
    :header: Parameter, Type, Purpose
    :widths: 20, 20, 60
    :stub-columns: 1

    repository, string, The name of the :doc:`repository` to access
    libraryID, int, The ID of the library entity


Post
~~~~

.. http:post:: /api/repositories/(string:repository)/library/entities/(int:libraryID)/checkxmlexpressionfromentity
    :synopsis: Validate an expression against an entity

.. code-block:: http

    POST /api/repositories/jupiter/library/entities/2/checkxmlexpressionfromentity HTTP/1.1
    Content-Type: application/json

    {
        "entity": "2",
        "expression": "'Bank Name'"
    }

The message body is a JSON string containing two key-value pairs: the first, ``ENTITY``, is the :doc:`entity` ID to check against; the second, ``expression``, is the expression to check.

.. csv-table::
    :header: Response Code, Reason
    :widths: 25, 75

    200, Success
    500, Server error

A successful response contains the expression transformed into XML.

The request above would result in the following response:

.. code-block:: http

    HTTP/1.1 200 OK
    Content-type: text/xml

    <?xml version="1.0" ?>
    <expr>
        <text>'Bank Name'</text>
        <var>Bank Name</var>
    </expr>

If an attribute referenced in the expression doesn't exist in the :doc:`entity`, the reponse will be:

.. code-block:: http

    HTTP/1.1 200 ok
    Content-type: text/xml

    unrecognized variable 'Bank Name'