"info" URI Scheme

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info:dlf/

info-namespace dlf
namespace-title Namespace of Digital Library Federation Identifiers
registration-date 2008-05-13
namespace-authority
organisation-name Digital Library Federation
organisation-address 1755 Massachusetts Avenue NW Suite 500, Washington DC 20036-2124
organisation-uri http://www.diglib.org/
contact-person Barrie Howard
contact-email bhoward@clir.org
contact-tel +1 202 939 4769
contact-uri http://www.diglib.org/
identifier-syntax
description
Identifiers in the dlf namespace are used to identify 
information assets used in Digital Library Federation 
research and development projects.

An  'info' URI with  namespace 'dlf' takes the form:

info:dlf/<dlf-project>/<project-specific-id>
 
dlf-project = ALPHA *( ALPHA | DIGIT )

i.e. alphanumeric with leading alphabetic character.

Values of dlf-project are assigned by the Digital Library Federation and
registered at http://diglib.org/namespace/Projects.txt.  At the time of this
registration the only valid dlf-project value is "Aquifer".

project-specific-id = project-specific-component *("/" project-specific-component) 

project-specific-component = *pchar 

pchar is as defined in RFC 3986, that is:

pchar  = unreserved | pct-encoded | sub-delims | ":" | "@"
unreserved    = ALPHA | DIGIT | "-" | "." | "_" | "~"
pct-encoded = "%" HEXDIG HEXDIG
sub-delims  = "!" | "$" | "&" | "'" | "(" | ")"  | "*" | "+" | "," | ";" | "="

ALPHA, DIGIT, AND HEXDIG are as defined in RFC 2234: upper 
or  lower case alphabetic (A-Z | a-z), decimal digit (0-9), 
and hexadecimal digit (DIGIT | "A" | "B" | "C" | "D" | "E" | "F")  respectively.

Percent Encoded Characters  

No characters in general need to be percent encoded. 
uri http://www.diglib.org/namespace/IdentifierSyntax.txt
identifier-normalization
description
All identifiers in the dlf namespace are case-sensitive.
uri http://www.diglib.org/namespace/IdentifierNormalization.txt
identifier-examples
identifier-example
native
info-uri info:dlf/Aquifer/AssetActions/AssetDefinition/
identifier-example
native
info-uri info:dlf/Aquifer/AssetActions/MODS3.2-extension/
identifier-example
native
info-uri info:dlf/Aquifer/AssetActions/getWebView
identifier-example
native
info-uri
identifier-example
native
info-uri
identifier-example
native
info-uri
namespace-information
description
Identifiers in the dlf namespace are used to identify information assets
used in Digital Library Federation research and development projects.
Identifiers will vary according to project.  Their uses currently include:

* Target namespaces for XML Schema, for example: info:dlf/Aquifer/AssetActions/AssetDefinition/

* Identifiers for use in ontologies, for example RDF property labels, such as:
 info:dlf/Aquifer/AssetActions/getWebView
uri http://www.diglib.org/namespace/NamespaceInformation.txt
service-mechanism
description
No service mechanisms are at present defined. 
uri

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The "info" URI Registry Prototype is currently managed by the OCLC Office of Research on behalf of NISO.