Heterogenous Datasources and Metadata
(The following list was extracted from http://purl.org/dc/)
Definition: A name given to the resource.
Definition: An entity primarily responsible for making the content of
Comment: Examples of a Creator include a person, an organisation,
or a service.
Definition: The topic of the content of the resource.
Comment: Typically, a Subject will be expressed as keywords,
key phrases or classification codes that describe a topic
of the resource.
Definition: An account of the content of the resource.
Comment: Description may include but is not limited to: an
abstract, table of contents, reference to a graphical
representation of content or a free-text account of
Definition: An entity responsible for making the resource available
Comment: Examples of a Publisher include a person, an
organisation, or a service.
Definition: An entity responsible for making contributions to the
content of the resource.
Comment: Examples of a Contributor include a person, an
organisation, or a service.
Definition: A date associated with an event in the life cycle of the
Comment: Typically, Date will be associated with the creation or
availability of the resource.
Definition: The nature or genre of the content of the resource.
Comment: Type includes terms describing general categories,
functions, genres, or aggregation levels for content.
Definition: The physical or digital manifestation of the resource.
Comment: Typically, Format may include the media-type or
dimensions of the resource. Format may be used to
determine the software, hardware or other equipment
needed to display or operate the resource. Examples
of dimensions include size and duration.
Definition: An unambiguous reference to the resource within a given
Comment: Recommended best practice is to identify the resource by
means of a string or number conforming to a formal
Example formal identification systems include the Uniform
Resource Identifier (URI) (including the Uniform Resource
Locator (URL)), the Digital Object Identifier (DOI) and
the International Standard Book Number (ISBN).
Definition: A Reference to a resource from which the present resource
Comment: The present resource may be derived from the Source
resource in whole or in part.
Definition: A language of the intellectual content of the resource.
Definition: A reference to a related resource.
Definition: The extent or scope of the content of the resource.
Comment: Coverage will typically include spatial location (a place
name or geographic coordinates), temporal period (a
period label, date, or date range) or jurisdiction (such
as a named administrative entity).
Definition: Information about rights held in and over the resource.
Comment: Typically, a Rights element will contain a rights
management statement for the resource, or reference
a service providing such information. Rights information
often encompasses Intellectual Property Rights (IPR),
Copyright, and various Property Rights.
If the Rights element is absent, no assumptions can be
made about the status of these and other rights with
respect to the resource.
3 Levels of Internet Protocols:
1) Networking Protocols : HTML, HTTP
2) Metadata, Knowledge Exchange, Signature Protocols, Style Sheets
XML Extensible Markup Language;
XSL Extensible Style Language, CSS Cascading Style Sheets
RDF Resource Description Framework; language for writing metadata
<DC:Title>The W3C Folio 1999</DC:Title>
<DC:Creator>W3C Communications Team</DC:Creator>
<DC:Subject>Web development, World Wide Web
Consortium, Interoperability of the Web</DC:Subject>
3) Social Protocols: Privacy and Content Selection
P3P Platform for Privacy Preferences;
web sites state their privacy practices which user agents match
against the preferences defined by the user; based on RDF
PICS Platform for Internet Content Selection;
standard for annotating (rating) webpages according to their content; based on RDF
<META http-equiv="PICS-Label" content='
labels for "http://w3.org/PICS/vocab.html"
ratings (q2 v3))'>