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OMI - Response Header

Draft MDC Standard

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5.3.2 Response header

Each response shall contain a header that describes the server’s response to 1 request.

The response header is a short string <SS> so that the agent can locate the field following the header. 5.3.1 discusses the need for this ability.

The fields of the response header and their sequence shall be:

  1. Error class: <LI> denotes 1 of 65 536 classes of errors. The MUMPS Development Committee assigns classes to OMI versions and to specific extensions of the standard (see 4.12). The classes of errors specified by ANSI/MDC X11.2 shall be 0 and 1. All other classes are reserved for assignment by the MUMPS Development Committee.
    An error class of 0 means that the request completed successfully. Class 1 indicates failure to perform the request.
  2. Error type: <SI> indicates the result of the server’s attempt to perform the request. When the error class is 0, indicating success, then the error type indicates types of success. For other error classes, the error type denotes a specific error condition.
  3. Error modifier: <LI> modifies the meaning of specific error conditions. This field is optional, therefore it may be set to 0 by a server and may be ignored by an agent. See specific operations in 5.4 for use of the error modifier.
  4. Server status: <LI> conveys information about the server itself, and is not necessarily related to the request. Each change in server status is conveyed in only 1 response. A value of 0 means that no change in server status has occurred since the last response.
  5. Sequence number: <LI> This number shall equal the sequence number of the corresponding request.
  6. Request identifier: This number shall equal the request identifier of the corresponding request.
<SS>
<SI> <LI>
Class		 <LI>
Type		 <LI>
Modifier		 <LI>
Server Status		 <LI>
Sequence		 <LI>
Req ID

Figure 6 – Form of a response header

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Copyright © Standard Documents; 1977-2024 MUMPS Development Committee;
Copyright © Examples: 1995-2024 Ed de Moel;
Copyright © Annotations: 2003-2008 Jacquard Systems Research
Copyright © Annotations: 2008-2024 Ed de Moel.

Some specifications are "approved for inclusion in a future standard". Note that the MUMPS Development Committee cannot guarantee that such future standards will indeed be published.

This page most recently updated on 14-Nov-2023, 21:47:33.

For comments, contact Ed de Moel (demoel@jacquardsystems.com)