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METS  March 2002

METS March 2002

Subject:

Re: METS java toolkit

From:

Jerome McDonough <[log in to unmask]>

Reply-To:

Metadata Encoding and Transmission Standard <[log in to unmask]>

Date:

Fri, 15 Mar 2002 20:26:23 -0500

Content-Type:

multipart/mixed

Parts/Attachments:

Parts/Attachments

text/plain (73 lines) , text/plain (6 lines)

Keen!

Stephen, do you have objections to Morgan making
the *.tar.gz file available through the METS site,
along with a link to your documentation web
page?

----- Original Message -----
From: Stephen Abrams <[log in to unmask]>
Date: Friday, March 15, 2002 5:44 pm
Subject: [METS] METS java toolkit

> Hello:
>
> To support digital library work we are doing at Harvard, we have
> developeda prototype Java toolkit that can be used to procedurally
> construct,validate, serialize and de-serialize METS files.  The
> toolkit API is based
> on Sun's JAXB specification.  Even though JAXB is supposed to
> include a
> schema compiler to automatically generate Java binding classes
> from a
> schema, since JAXB is still in pre-release development that
> compiler is not
> yet available in suitable form.  So all of the toolkit classes
> have been
> built manually.  (Not a terrible job; since they all have the same
> structure, there was a lot of cut-and-paste.)  The low-level
> parser is
> built on James Clark's XP.
>
> The web page <"
> target="l">http://hul.harvard.edu/~stephen/mets.html> provides a
> betterdescription of the toolkit, as well as providing a link to a
> downloadableversion <."
> target="l">http://ois.harvard.edu/~stephen/mtk-20020315.tar.gz>.
> In addition
> to all the source code, there are two test applications, one that
> procedurally constructs, validates, and serializes a METS file,
> and one
> that de-serializes a METS file to an in-memory representation of
> instantiated toolkit classes.  The quickest way to get a feel for the
> toolkit it to examine the source code for these two apps,
> Marshal.java and
> Unmarshal.java.
>
> Just to keep the internal toolkit structure in line with JAXB, I
> definethree packages, org.mets.xml.bind, org.mets.xml.marshal, and
> org.mets.xml.mets.  This should be changed at some point, because the
> domain name mets.org is registered to the Miami Evangelical
> Seminary.  As
> METS tools such as this are developed, should there be a common
> packagenaming scheme for them?
>
> This is still a rough prototype, but it seems to work for the
> small amount
> of simple testing that I have done so far.  I wanted to publicize
> this in
> order to get feedback from the wider community.  For example: Is
> such a
> toolkit a useful idea?  Is there a better solution already
> existing?  Is
> JAXB a good model for the toolkit API?
>
> I am planning to put together a more former and in depth
> description of the
> toolkit for the Spring DLF forum.  Any comments that I receive
> before then
> will be incorporated.
>
> Thanks,



__________________________________________________________ Stephen L. Abrams [log in to unmask] Digital Library Software Engineer Tel: (617) 495-3724 Office for Information Systems Fax: (617) 495-0491 Harvard University Library

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