METS Revisited

Bill KehoeMetadata Working Group

ForumDecember 19, 2003

METS

Metadata Encoding and Transmission StandardDigital Library Federation InitiativeSibling: MOA2 Encoding Format

Why?

Complex digital objects vs physical objectsMetadata containersTransferOAIS information packages

Simplest METS object: concept

METS document

Structural Map

Division

METS pointer

METS document

Structural Map

Division

File pointer

Simplest METS object: elements

<mets>

<structMap>

<div>

<mptr>METS document

Structure Map

Division

file pointer

Simplest METS object: XML

<?xml version="1.0" encoding="UTF-8"?>

<mets xmlns="http://www.loc.gov/METS/" >

<structMap>

<div>

<mptr LOCTYPE="URL">

http://www.library.cornell.edu/AnotherMETSDoc.xml

</mptr>

</div>

</structMap>

</mets>

METS document with a file

METS document

Structural Map

Division

File pointer

File Section

File Group

File

The File tag simplified

<File>

ID (required)

MIMETYPE

SIZE

CREATED

CHECKSUMTYPE

CHECKSUM

File location

File content(XML or Base64)

XOR

The full METS object: concept

METS document

METS Header

Structural Map

Structural Links

Behavior

Descriptive Metadata

Administrative Metadata

File Section

The full METS object: 7 basic elements

METS document <mets>

<metsHdr>

<structMap>

<structLink>

<behaviorSec>

<dmdSec>

<amdSec>

<fileSec>

Administrative Metadata Section

<amdSec>

<sourceMD>

<mdWrap>

<mdRef>

<digiprovMD>

<mdWrap>

<mdRef>

<rightsMD>

<mdWrap>

<mdRef>

<techMD>

<mdWrap>

<mdRef>

Descriptive Metadata Section

<dmdSec>

<mdWrap><mdRef>

METS Profiles

“…to specify limitations and restrictions…”“…to define a document class…”“…to promote interoperability and exchange of METS documents…”

From METS Profile 1.0 Requirements, Appendix 1: METS Profile XML Schema

The METS Profile: concept

METS ProfileCreation Date

Contact Information

Extension Schema

Related Profiles

Abstract

Short Title

URI

Sample File

Tools and Applications

Technical Requirements

Structural Requirements

A real-life example…

What can be done with this METS object?

The Tokyo Tribunalhttp://dlib.nyu.edu:8083/xmldev/servlet/SaxonServlet?source=/newtokyo.xml&style=/METSFrameSX.xsl

any time thinking about cost models, except where it's obvious that building and maintaining something would be prohibitively expensive. I suppose I have enough opinions, but maybe not enough facts, for a satisfactory working dinner solely about cost models. 

Another example from NYU

Afghanistan Digital Library Page Turnerhttp://dlib.nyu.edu:8083/servlet/SaxonServlet?source=kalimat.xml&style=FrameSearch03.xsl

A Cautionary Tale

A presentation by Carl Fleischhauer:

The Library of Congress Audio-Visual Prototyping Projecthttp://lcweb.loc.gov/rr/mopic/avprot/METSopening2003_files/slide0001.htm

Two more demos from NYU

An archived web sitehttp://dlib.nyu.edu:8083/xmldev/servlet/SaxonServlet?source=ibarretxe20030907.xml&style=crl2.xsl

Multimedia: METS to SMILhttp://dlib.nyu.edu/metstools/mets2smilviewer/mmvwr04/output/index01.html

Discussion: METS ProsPotential for interoperability among CUL sites

Discussion: METS ConsA lot of up-front expense

Almost everything about METS…

The METS Official Web Site

http://www.loc.gov/standards/mets/