Use of Handles at the National Agricultural Library. “Getting a Handle on Federal Information: Persistent Identification Using Handles—a CENDI Workshop” Sherry L. Davids January 29, 2003. Today’s Discussion. Background Why Handles? How we use Handles Maintaining Handles Conclusion.
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“Getting a Handle on Federal Information: Persistent Identification Using Handles—a CENDI Workshop”
Sherry L. Davids
January 29, 2003
In early 2001, NAL began to become aware of the need to incorporate metadata into digital objects:
The NAL Metadata Element Set is based on the Dublin Core Metadata Element Set and can be accessed at:
PURLS (Persistent Uniform Resource Locators)
NAL decided that Handles best suited our needs
THE NAL METADATA TEMPLATE
The NAL Metadata Template(online fill-in form) was developed to facilitate metadata creation by NAL staff. Staff members must register and obtain a password in order to access the template
The Identifier becomes part of the Handle.
When the metadata is “submitted,” four things happen:
1. HTML Metadata tags are generated which can be copied and pasted directly into the electronic resource
NAL Metadata Tags
<TITLE> "Who Will Pay for On-Farm Environmental Improvements in the 21st Century?" </TITLE>
<META content="Dublin Core Metadata Template (NAL Metadata)">
<META name=NAL.Title content="Who Will Pay for On-Farm Environmental Improvements in the 21st Century?">
<META name=NAL.Creator Scheme="PersonalName" content="Clark, Andy">
<META name=NAL.Creator Scheme="PersonalName" content="Gagnon, Stuart R.">
<META name=NAL.Subject.Keyword content="agricultural economics">
<META name=NAL.Subject.NAL Thesaurus content="agricultural economics">
<META name=NAL.Description content=""Agriculture in the United States has historically produced a food supply that is relatively inexpensive.” That benefits our society. However, agriculture, like other land uses, can have negative impacts on the natural environment. That detracts from our quality of life. To counter this, many people are working toward the goal of protecting the environment while maintaining the agricultural producer's ability to operate a viable enterprise that provides an adequate standard of living, contributes to the community and produces high quality, affordable food."">
<META name=NAL.Publisher content="National Agricultural Library">
<META name=NAL.Date.Created content="2000-05-11" Scheme="ISO8601">
<META name=NAL.Date.Issued content="2000-04-00" Scheme="ISO8601">
<META name=NAL.Date.Modified content="2001-08-15" Scheme="ISO8601" >
<META name=NAL.Resource.Availability content="No Guarantee">
<META name=NAL.Type content="Text">
<META name=NAL.Content.Stability content="Permanence Not Guaranteed">
<META name=NAL.Format content="text/html">
<META name=NAL.Identifier content="http://www.nal.usda.gov/wqic/Bibliographies/agecon.html" Scheme="URL" >
<META name=NAL.Identifier.NAL content="hdl.handle.net/1030.28/NAL0000000c">
<META name=NAL.Source content="SRB 2000-01" Scheme="Free text" >
<META name=NAL.Language content="eng">
<META name=NAL.Coverage.Jurisdiction content="united states">
<META name=NAL.Rights content="Public Domain">
The e-mail message:
Modified Bibliographic Record for a Print Resource now available electronically:
2 070 0 aS21.D27 #b S64 no. 2000-01
3 072 0 E100
4 074 0095-A-03
5 086 0 A 17.24:2000-01
6 090 S441 #b .W49 2000
7 090 #b
8 049 AGLL
9 245 00 Who will pay for on-farm environmental improvements in the 2lst century? : #b a resource guide / #c Compiled by Andy Clark ... [et al.].
10 246 3 Who will pay for on farm environmental improvements in the 2lst century
11 260 Beltsville, Md. : #b USDA, ARS, National Agricultural Library, #c 
12 300 63 p. : #b ill. ; #c 28 cm.
13 490 1 Special reference briefs series, #x 1052-536X ; #v SRB 2000-01
14 500 Shipping list no.: 2000-0261-P.
15 500 "April 2000."
16 500 Includes index.
17 530 Also available via remote access.
18 650 0 Sustainable agriculture #z United States #v Bibliography.
18 650 0 Sustainable agriculture #z United States #v Bibliography.
19 650 0 Sustainable agriculture #z United States #x Computer network resources.
20 650 0 Agriculture #x Environmental aspects #z United States #x Finance #x Computer network resources.
21 650 0 Agricultural pollution #z United States #v Bibliography.
23 700 1 Clark, Andy.
24 710 2 National Agricultural Library (U.S.)
25 830 0 Special reference briefs ; #v NAL-SRB. 2000-01.
26 856 41 #u http://hdl.handle.net/1030.28/NAL0000000c
CREATING NEW BIBLIOGRAPHIC RECORDS FROM METADATA
Currently, the process of creating new bibliographic records from metadata is a semi-automatic process:
- The cataloger copies the URL from the metadata contained in the e-mail message and copies it into OCLC’s Connexion (cataloging interface)
- Connexion program extracts the metadata from the resource and creates a preliminary bibliographic record
We have had preliminary talks with OCLC about developing a procedure to export the NAL metadata records directly to Connexion, which would create the bibliographic records from the metadata and deposit the records directly into the Connexion database
The completed bibliographic record is exported to AGRICOLA from Connexion.
NAL customers search the AGRICOLA site for the resources they require. Records for resources in electronic form for which we have created metadata will contain a Handle; all the customer need do is click on the Handle to retrieve the resource.
Any item to which NAL has assigned a handle can also be retrieved from the CNRI site:
in the text box fill in the handle (NAL’s ID and the identification number)
- NAL staff are required to inform the Cataloging Branch whenever the URL of a resource to which a handle has been assigned
- Cataloging branch staff edit the records in NAL’s MySQL database and also in the CNRI Handle system so that the Handle will continue to resolve to the resource
However, we feel that the effort has been well worth it because:
- Electronic resources created by NAL staff have increased accessibility
- through bibliographic records in AGRICOLA
- through OCLC’s Connexion
- through standard search engines because of the metadata embedded in them
- Bibliographic records containing URLs for electronic resources have to be modified every time a URL changes.
- Bibliographic records containing Handles will not have to be edited when a resource moves to a different directory or server or is renamed.