The Media Types application/mods+xml, application/mads+xml, application/mets+xml, application/marcxml+xml, application/sru+xml
draft-denenberg-mods-etc-media-types-02

Abstract

This document specifies Media Types for the following formats: MODS (Metadata Object Description Schema), MADS (Metadata Authority Description Schema), METS (Metadata Encoding and Transmission Standard), MARCXML (MARC21 XML Schema), and the SRU (Search/Retrieve via URL Response Format) Protocol response XML schema. These are all XML schemas providing representations of various forms of information including metadata and search results.

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Table of Contents

1.  Introduction
2.  Registration for mods+xml
3.  Registration for mads+xml
4.  Registration for mets+xml
5.  Registration for marcxml+xml
6.  Registration for sru+xml
7.  IANA Considerations
8.  Security Considerations
9.  References
    9.1.  Normative References
    9.2.  Informative References
§  Authors' Addresses

1.  Introduction

The Library of Congress, on behalf of and in collaboration with various components of the metadata and information retrieval community, has issued specifications which define formats for representation of various forms of information including metadata and search results. This memo provides information about the Media Types associated with several of these formats, all of which are XML schemas.

MODS: Metadata Object Description Schema.

An XML schema for a bibliographic element set that may be used for a variety of purposes, and particularly for library applications.

MADS: Metadata Authority Description Schema.

An XML schema for an authority element set used to provide metadata about agents (people, organizations), events, and terms (topics, geographics, genres, etc.). It is a companion to the MODS Schema.

METS: Metadata Encoding and Transmission Standard.

An XML schema for encoding descriptive, administrative, and structural metadata regarding objects within a digital library.

MARCXML MARC21 XML Schema.

An XML schema for the direct XML representation of the MARC format (for which there already exists a media type, application/marc; see [RFC2220] (Guenther, R., “The Application/MARC Content-type,” October 1997.)). By "direct XML representation" we mean that it encodes the actual MARC data within XML. (This is in contrast to MODS: MARC uses codes for its element names; MODS represents the same information but uses semantically meaningful names while MARCXML uses the MARC codes.)

SRU: Search/Retrieve via URL Response Format.

An XML schema for the SRU response. SRU is a protocol, and the media type sru+xml pertains specifically to the default SRU response. The SRU response may be supplied in any of a number of suitable schemas, RSS, ATOM, for example, and the client identifies the desired format in the request, hence the need for a media type. This mechanism will be introduced in SRU 2.0; in previous versions (that is, all versions to date; 2.0 is in development) all responses are supplied in the existing default format, so no media type was necessary. SRU 2.0 is being developed within the Organization for the Advancement of Structured Information Standards (OASIS).

2.  Registration for mods+xml

MIME media type name: application

MIME subtype name: mods+xml

Required parameters: None

Optional parameters: (charset)

This parameter has semantics identical to the charset parameter of the "application/xml" media type as specified in [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Encoding considerations:

Identical to those of "application/xml" as described in [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Security considerations:

The same security considerations as described in Section 10 of [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Interoperability considerations:

There are no known interoperability issues.

Published specification:

[MODS‑SCHEMA] (Denenberg, R., “MODS Schema,” .), [MODS] (Denenberg, R., “Metadata Object Description Schema,” .)

Applications which use this media type:

Various MODS conformant toolkits use this media type.

Additional information:

Magic number(s): None

File extension(s): .mods

Macintosh file type code(s): TEXT

Person and email address to contact for further information:

Ray Denenberg <rden@loc.gov>

Intended usage: COMMON

Restrictions on usage: None

Author/Change controller:

The MODS specification was developed by the Library of Congress and is maintained by the Library of Congress in conjunction with the MODS Editorial Committee which has change control over the specification.

3.  Registration for mads+xml

MIME media type name: application

MIME subtype name: mads+xml

Required parameters: None

Optional parameters: (charset)

This parameter has semantics identical to the charset parameter of the "application/xml" media type as specified in [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Encoding considerations:

Identical to those of "application/xml" as described in [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Security considerations:

The same security considerations as described in Section 10 of [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Interoperability considerations:

There are no known interoperability issues.

Published specification:

[MADS‑SCHEMA] (Denenberg, R., “MADS Schema,” .), [MADS] (Denenberg, R., “Metadata Authority Description Schema,” .)

Applications which use this media type:

Various MADS conformant toolkits use this media type.

Additional information:

Magic number(s): None

File extension(s): .mads

Macintosh file type code(s): TEXT

Person and email address to contact for further information:

Ray Denenberg <rden@loc.gov>

Intended usage: COMMON

Restrictions on usage: None

Author/Change controller:

The MADS specification was developed by the Library of Congress and is maintained by the Library of Congress in conjunction with the MODS Editorial Committee which has change control over the specification.

4.  Registration for mets+xml

MIME media type name: application

MIME subtype name: mets+xml

Required parameters: None

Optional parameters: (charset)

This parameter has semantics identical to the charset parameter of the "application/xml" media type as specified in [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Encoding considerations:

Identical to those of "application/xml" as described in [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Security considerations:

The same security considerations as described in Section 10 of [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Interoperability considerations:

There are no known interoperability issues.

Published specification:

[METS‑SCHEMA] (Denenberg, R., “METS Schema,” .), [METS] (Denenberg, R., “Metadata Encoding and Transmission Standard,” .)

Applications which use this media type:

Various METS conformant toolkits use this media type.

Additional information:

Magic number(s): None

File extension(s): .mets

Macintosh file type code(s): TEXT

Person and email address to contact for further information:

Ray Denenberg <rden@loc.gov>

Intended usage: COMMON

Restrictions on usage: None

Author/Change controller:

The METS specification was developed by the Library of Congress and is maintained by the Library of Congress in conjunction with the METS Editorial Board as an initiative of the Digital Library Federation.

5.  Registration for marcxml+xml

MIME media type name: application

MIME subtype name: marcxml+xml

Required parameters: None

Optional parameters: (charset)

This parameter has semantics identical to the charset parameter of the "application/xml" media type as specified in [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Encoding considerations:

Identical to those of "application/xml" as described in [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Security considerations:

The same security considerations as described in Section 10 of [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Interoperability considerations:

There are no known interoperability issues.

Published specification:

[MARCXML‑SCHEMA] (Denenberg, R., “MARCXML Schema,” .), [MARCXML] (Denenberg, R., “MARCXML MARC21 XML Schema,” .)

Applications which use this media type:

Various MARCXML conformant toolkits use this media type.

Additional information:

Magic number(s): None

File extension(s): .mrcx

Macintosh file type code(s): TEXT

Person and email address to contact for further information:

Ray Denenberg <rden@loc.gov>

Intended usage: COMMON

Restrictions on usage: None

Author/Change controller:

The MARCXML standard is driven by the MARC standards, maintained at the Library of Congress.

6.  Registration for sru+xml

MIME media type name: application

MIME subtype name: sru+xml

Required parameters: None

Optional parameters: (charset)

This parameter has semantics identical to the charset parameter of the "application/xml" media type as specified in [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Encoding considerations:

Identical to those of "application/xml" as described in [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Security considerations:

The same security considerations as described in Section 10 of [RFC3023] (Murata, M., St. Laurent, S., and D. Kohn, “XML Media Types,” January 2001.).

Interoperability considerations:

There are no known interoperability issues.

Published specification:

[SRU‑SCHEMA] (Denenberg, R., “SRU Schema,” .), [SRU] (Denenberg, R., “Search/Retrieve via URL Response Format,” .)

Applications which use this media type:

Various SRU conformant toolkits use this media type.

Additional information:

Magic number(s): None

File extension(s): .sru

Macintosh file type code(s): TEXT

Person and email address to contact for further information:

Ray Denenberg <rden@loc.gov>

Intended usage: COMMON

Restrictions on usage: None

Author/Change controller:

The SRU specification for versions earlier than 2.0 is maintained at the Library of Congress, in conjunction with the SRU Editorial Board. Version 2.0 (for which the sru+xml media type pertains) is being developed within OASIS.

7.  IANA Considerations

IANA is requested to register five media types described in Sections 2, 3, 4, 5, and 6 in the MIME media type registry (in the Standards Tree).

8.  Security Considerations

This document only registers new media types. Their relevant security considerations are listed in the registeration templates in Sections 2, 3, 4, 5, and 6. This document does not have any additional security considerations.

9.  References

9.1. Normative References

9.2. Informative References

Authors' Addresses