Thanks, this is also good information. I need to become more familiar
with PREMIS.
We'll probably only be able to use this date/time format or DCMI Period
if we can get our system (Ex Libris Digitool) to convert the structured
date to display a "friendlier" format of date range for users (something
like "2008-11-08 to 2008-11-09"). I need to explore our options with our
systems person. There are some concerns that the more standardized
machine-readable date range formats won't make sense to users or that
they look awkward.
For those who are using structured, machine-readable formats for dates
(or other fields), are you displaying them to users as-is, or do you
parse the data into something "nicer-looking" for display? How do your
systems accomplish this? Do you incorporate something like this into
the code that displays your metadata:
<http://dublincore.org/documents/dcmi-dcsv/#parsing> ?
Thanks very much!
Katie Dunn
-----Original Message-----
From: Ray Denenberg, Library of Congress [mailto:[log in to unmask]]
Sent: Monday, November 24, 2008 11:27 AM
To: Dunn, Kathryn M.; [log in to unmask]
Subject: Re: best practice for date ranges
Sorry to come late to this discussion .... We have been working on a
date/time definition, it is based on ISO 8601 (although not on W3CDTF,
for
reasons described in the second reference below), supports ranges and
several other features, is part of the PREMIS 2.0 schema, and we are
considering developing it further for use in other schemas.
The schema is at:
http://www.loc.gov/standards/premis/datetime/extendedDateTime.xsd
See also:
http://www.loc.gov/standards/premis/datetime/
--Ray Denenberg
----- Original Message -----
From: "Dunn, Kathryn M." <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, November 19, 2008 5:33 PM
Subject: best practice for date ranges
Hello!
Forgive me if this isn't the right listserv for implementation questions
- suggestions for more appropriate places to go are welcome.
I am wondering if there is any prevailing thought on how to represent a
date range, when using the W3CDTF profile of ISO 8601.
http://dublincore.org/documents/dcmi-terms/#terms-date uses the
definition "A point or period of time associated with an event in the
lifecycle of the resource.", and recommends
http://www.w3.org/TR/NOTE-datetime, but there is no guidance there on
how we might handle a period of time.
I feel like I have seen something like this within a DC date element,
but can't come up with any references:
start=2008-11-08; end=2008-11-09
Thanks in advance for any help!
Katie Dunn
Technology & Metadata Librarian
Rensselaer Polytechnic Institute
518-276-8353
[log in to unmask]
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