Title: The feeding habits of OAISTER catchers, or metadata to go
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Permanent Link: http://ufdc.ufl.edu/IR00000004/00001
 Material Information
Title: The feeding habits of OAISTER catchers, or metadata to go
Physical Description: Archival
Creator: International Association of Aquatic and Marine Science Libraries and Information Centers. Conference (30th : 2004 : Hobart, Tas.)
Haas, Stephanie C.
Donor: unknown ( endowment )
Publisher: International Association of Aquatic and Marine Science Libraries and Information Centers
Place of Publication: Fort Pierce, Fla.
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Funding: Collected for University of Florida's Institional Repository by the UFIR Self-Submittal tool. Submitted by Stephanie Haas.
 Record Information
Bibliographic ID: IR00000004
Volume ID: VID00001
Source Institution: University of Florida Institutional Repository
Holding Location: University of Florida Institutional Repository
Rights Management: All rights reserved by the source institution and holding location.

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THE FEEDING HABITS OF OAISTER CATCHERS, OR METADATA TO GO

Stephanie C. Haas
Assistant Director, Digital Library Center
University of Florida Libraries
Gainesville, FL 32611
haas@uflib.ufl.edu

Basically, the Open Archive Metadata Harvesting Initiative is all about indexing
resources and sharing the indexing.

The traditionally sophisticated MARC records of libraries have been shared using
protocols such as Z39.50. This has proven very effective, except Z39.50:
dislikes metadata other than MARC
requires a special view for non-MARC records, and
is not scalable. Meaning the more distributed record collections you search, the
more likely it is that one or more will be down, and search time becomes an
issue.

Dublin Core metadata is the scarecrow version of MARC. It was originally created to
describe web resources in 15 fields or less.

Title Publisher
Format Relation
Creator Contributor
Identifier Coverage
Subject Date
Source Rights
Description Type
Language

Dublin Core was intended to be used as a self-indexing mechanism for web page
developers. DC records were to be added to the header of html pages, but.. .unscrupulous
web page creators packed it with enticing non-relevant words, search engines ignored it,
and you can imagine what happened.

Dublin Core was repurposed by physicists at Los Alamos to index their burgeoning e-
print collections. By the way, these e-print collections were called "archives" and because
they were accessible to all, they were "open."

Then it became obvious that they needed a way to share information across e-print
collections. In short, they needed a way to harvest Dublin Core metadata from multiple
repositories. This led us right into the Open Archives Metadata Harvesting Protocol.











The Coalition for Networked Information and Digital Library Federation provided
funding to establish an Open Archives Initiative secretariat at Cornell University.

Managed by Carl Lagoze and Herbert Van de Sompel an international steering committee
developed the metadata harvesting protocol.

The Key players in the OAI-PMH world

Data Providers: these are the repositories that dangle out their Dublin Core metadata in a
format that is OAI compliant. Minimal OAI compliant metadata consists of the
unqualified 15-field Dublin Core metadata. However, the protocol does support any
metadata format that is encoded in XML.

Service Providers: these are the harvesters, or the OAlster catchers, who skim along from
repository to repository gathering up the OAI compliant metadata, integrating it, and
caching it.

A few more definitions:

Item: object in a repository that has a unique identifier and metadata

Identifier: unique item key

Record: metadata in a specified format: Dublin Core, MARC, FGDC

Set: a construct for broadly grouping items; potentially useful in selective harvesting

Namespace: the definitions for elements and attributes used in XML documents

Schema: defines the structure, content, and semantics of XML documents and is used to
validate record formats.

How does it work?

Data providers serve the harvestable records consisting of unqualified Dublin Core in an
XML wrapper.

Service provider programs use the metadata harvesting protocol to issue very simple
HTTP-based requests. Basically, there are 6 request types called verbs that can be issued
by the harvester applications. The diagram below shows the request-response functions
and is borrowed from OAIfor Beginners
[http://www.oaforum.org/tutorial/english/page3.htm]
























Ruesponses: .







SeM structure







Each record consists of three parts with an XML wrapper:

Header (mandatory)

Identifier: each item has a unique identifier that combined with a metadataPrefix acts as a
key to extract a metadata record

Datestamp: last date of modification YYYY-MM-DD

setSpec elements: optional construct for grouping items for selective harvesting
K7~T-W J&1^^ ^^_F -
1 -- fMMW

____ ^- /5(i; [WvAC\"ft -~ "'*'"la j^^






















setSpec, elements: optional construct for grouping items for selective harvesting


^-..s-.,^












Metadata Formats (mandatory)


Within a repository, metadata formats are indicated by a metdataPrefix. Prefixes are
associated with namespace elements defined at a given URI. Schemas validate records
for a given namespace.

About (Optional) rights & provenance statements

A sample record for The Florida aluminum phosphate zone of the Bone Valley
Formation, Florida and its uranium deposits with XML tags



oai:palmm.fcla.edu:AAA0019QCB
2003-09-09
nsdl:feolbib
feol:feolbib


xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/
http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
The Florida aluminum phosphate zone of the Bone Valley Formation, Florida,
and its
uranium deposits.

1956
Jaffe, E.B.
Altschuler, Z.S.,




Interpretation of the record:

Header portion


oai:palmm.fcla.edu:AAA0019QCB
oai=scheme
palmm.fcla.edu=repository
AAA0019QCB is the identifier for the item in the repository
2003-09-09











nsdl:feolbib is part of the National Science Digital Library, Florida
Environments Online collection set
feol:feolbib is part of the Florida Environments Online collection
set


Metadata portion


[says anything with the prefix "oai_dc" is part of the namespace defined
by the document at the URI given. It also tags the element dc with the prefix oai_dc-this
is the only ELEMENT in the record that is part of the oai_dc namespace and it is a record
definition that includes all the other elements.]

xmlns:dc="http://purl.org/dc/elements/1.1/"
[says anything with the prefix dc is part of the namespace defined at the URI given]

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
[says anything with the prefix xsi is part of the namespace defined at the URI given]

xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/
http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
[says the element schemaLocation is defined at the given URI and that the
schema itself is located at the second URI. This schema is used to validate this record.]

Th;Florida aluminum phosphate zone of the Bone Valley Formation, Florida,
and its uranium deposits.

[says this is the field defined as the Dublin core element title]

1956
[says this is the field defined as the Dublin core element date]

Jaffe, E.B.
[says this is the field defined as the Dublin core element contributor]

Cuttitta, F.
[says this is the field defined as the Dublin core element contributor]

Altschuler, Z.S.,
[says this is the field defined as the Dublin core element creator which is the MARC field
author]





















Because we know that this record has been captured and cached by the National Science
Digital Library, we can look for it in that repository [http://www.nsdl.org/]. The image
below shows the brief record and the expanded view. Note: only five of the Dublin Core
fields are actually displayed.




Loi ~str(Hl
N SM 1) L .


NSDL Search Results for

|Bone valley i


- -


(Displaying results: 1 20 of 26)
Hawthorn Bone Valley and Citronelle sediments In Florida. [No link
available]
[No description available] more info [Archived Version]
Late Hemphillian monodactyl horses (Mammalia, Equidae) from the
Bone Valley Formation of central Florida. [No link available]
[No description available] more info [Archived Version]


Late Hemphillian cat (Mammalia, Felldae) from the Bone Valley
Formation of central Florida. [No link available]
[No description available] more info [Archived Version]

Sediments of the Bone Valley phosphate district of Florida. [No link
available]
[No description available] more info [Archived Version]
The Florida aluminum phosphate zone of the Bone Valley Formation,
Florida, and its uranium deposits. [No link available]
rNo description available more inFo Lrrchived version1 l


NSDL Search Results for

lBone volley .

(Displaying results: 1 20 of 26) Next Results -4
Title/ Resource Found in
Description Format Collection
Hawthorn Bone Valley and Citronelle
sediments in Florida. [No link available]
[No description available] more info jArchived
Version]
Late Hemphllian monodactyl horses
(Mammlia, Equidae) from the Bone Valley
Formation of central Florida. [No link
available]
[No description available] more info [Archived
Version]


Title The Florida
aluminum
phosphate zone
of the Bone Valley
Forrnmaton,
Florida, and Its
uranium deposits.
[No link available]
Creator Altschuler, 2.S.,
Contributor Jaffe, E.B.
Contributor cuttitta. F.
Date 1956


Next Results *--*


NSDL
00- '1 5"i'd, I C.llectio- .1 Of A'It'NSOL Ah. I C-t;1 C t 1 C 0%. jy











The Open Archives site provides lists of both existing repositories, data providers
http://www.openarchives.org/Register/BrowseSites.pl and data harvesters
http://www.openarchives.org/service/listproviders.html.

Good introductions to the topic of the Open Archives Initiative Metadata Harvesting can
be found at the following web sites:

The Open Archives Initiative Protocol for Metadata Harvesting
http://www.openarchives.org/OAI/openarchivesprotocol.html

OAI for Beginners the Open Archives Forum online tutorial
http://www.oaforum.org/tutorial/

NSDL (National Science Digital Library) Metadata Primer
http://metamanagement.comm.nsdlib.org/outline.html

Exposing and Harvesting Metadata Using the OAI Metadata Harvesting Protocol: A
Tutorial
http://library.cem.ch/HEPLW/4/papers/3/



Acknowledgement:

With special thanks to Priscilla Caplan,Florida Center for Library Automation




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