The get_schemes message provides information about existing coding systems, called schemes. It returns a list of all the source systems.
This use case provides information about schemes to the client, who might want a list of all the source systems that contribute vocabulary.


A get_schemes message returns a list of schemes that will be displayed in the Ontology Find Terms tool. User information is provided in the message_header.

Generate Scheme Categories for a given User / Project

To populate the list of schemes available to a user the sequence of events is as follows:

1. A client requests a list of schemes for a given user or project (type=default).
2. The ONT server performs the following steps:
   1. Get the project / role available for the user from the PM Cell; this also serves to validate the user.
   2. Query the table of schemes and pass back a list of schemes associated with the project / role.

1. The client populates the scheme categories in the Find Terms tool.

get_schemes Request Message

<message_body>
<get_schemes type="default"/>
</message_body>

Possible "type" Settings

get_schemes Response Message

The get_schemes request has the following settings:
type=default

Response Message:
<message_body>
<concepts>
<concept>
<key>ICD9:</key>
<name>ICD9</name>
</concept>
</concepts>
</message_body>