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Encoding Dublin Core Metadata in HTML (RFC2731)

IP.com Disclosure Number: IPCOM000003327D
Original Publication Date: 1999-Dec-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 19 page(s) / 39K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Kunze: AUTHOR

Abstract

The Dublin Core [DC1] is a small set of metadata elements for describing information resources. This document explains how these elements are expressed using the META and LINK tags of HTML [HTML4.0]. A sequence of metadata elements embedded in an HTML file is taken to be a description of that file. Examples illustrate conventions allowing interoperation with current software that indexes, displays, and manipulates metadata, such as [SWISH-E], [freeWAIS-sf2.0], [GLIMPSE], [HARVEST], [ISEARCH], etc., and the Perl [PERL] scripts in the appendix.

This text was extracted from a ASCII document.
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Network Working Group J. Kunze

Request for Comments: 2731 Dublin Core

Category: Informational Metadata Initiative

December 1999

Encoding Dublin Core Metadata in HTML

Status of this Memo

This memo provides information for the Internet community. It does

not specify an Internet standard of any kind. Distribution of this

memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (1999). All Rights Reserved.

1. Abstract

The Dublin Core [DC1] is a small set of metadata elements for

describing information resources. This document explains how these

elements are expressed using the META and LINK tags of HTML

[HTML4.0]. A sequence of metadata elements embedded in an HTML file

is taken to be a description of that file. Examples illustrate

conventions allowing interoperation with current software that

indexes, displays, and manipulates metadata, such as [SWISH-E],

[freeWAIS-sf2.0], [GLIMPSE], [HARVEST], [ISEARCH], etc., and the Perl

[PERL] scripts in the appendix.

2. HTML, Dublin Core, and Non-Dublin Core Metadata

The Dublin Core (DC) metadata initiative [DCHOME] has produced a

small set of resource description categories [DC1], or elements of

metadata (literally, data about data). Metadata elements are

typically small relative to the resource they describe and may, if

the resource format permits, be embedded in it. Two such formats are

the Hypertext Markup Language (HTML) and the Extensible Markup

Language (XML); HTML is currently in wide use, but once standardized,

XML [XML] in conjunction with the Resource Description Framework

[RDF] promise a significantly more expressive means of encoding

metadata. The [RDF] specification actually describes a way to use

RDF within an HTML document by adhering to an abbreviated syntax.

This document explains how to encode metadata using HTML 4.0

[HTML4.0]. It is not concerned with element semantics, which are

defined elsewhere. For illustrative purposes, some element semantics

are alluded to, but in no way should semantics appearing here be

considered definitive.

The HTML encoding allows elements of DC metadata to be interspersed

with non-DC elements (provided such mixing is consistent with rules

governing use of those non-DC elements). A DC element is indicated

by the prefix "DC", and a non-DC element by another prefix; for

example, the prefix "AC" is used with elements from the A-Core [AC].

3. The META Tag

The META...