I thought this software might be of interest to the METS community. It
offers a mechanism to store XML-based compound digital objects (represented
using METS, MPEG-21 DIDL or otherwise) and their constituent datastreams.
The software has been developed at LANL.
Los Alamos, New Mexico, USA, December 15, 2005 - The LANL Digital Library
Research & Prototyping Team is pleased to announce the pre-release of their
aDORe Archive software.
The aDORe Archive is a write-once/read-many storage approach for Digital
Objects and their constituent datastreams. The approach combines two
interconnected file-based storage mechanisms that are made accessible in a
protocol-based manner. First, XML-based representations of multiple Digital
Objects are concatenated into a single, valid XML file named an XMLtape. The
creation of indexes for both the identifier and the creation datetime of the
XML-based representation of the Digital Objects, facilitates OAI-PMH-based
access. Second, ARC files, as introduced by the Internet Archive, are used
to contain the constituent datastreams of the Digital Objects in a
concatenated manner. An index for the identifier of the datastream
facilitates OpenURL-based access. The interconnection between an XMLtape and
its associated ARC file(s) is provided by conveying the identifiers of these
ARC files as administrative information in the XMLtape, and by including
OpenURL references to constituent datastreams of a Digital Object in the
XML-based representation of that Digital Object stored in the XMLtape. The
aDORe Archive allows for the storage of multiple XMLtapes and ARC files
through the introduction of OAI-PMH compliant XMLtape and ARCfile
The aDORe Archive 1.0 software was developed by the LANL Digital Library
Research & Prototyping Team. Development of the software was partly funded
by an NDIIP grant from the Library of Congress.
Feedback and questions regarding this release are welcome.
This software may be used without charge in accord with the terms of the
Library Greater Public License (LGPL).
Further context for the aDORe Archive software is provided in:
* Liu, X., Balakireva, L., Hochstenbach, P., Van de Sompel, H. "File-based
storage of Digital Objects and constituent datastreams: XMLTapes and
Internet Archive ARC files" (2005, June) http://arxiv.org/pdf/cs.DL/0503016
aDORe Archive 1.0 software page
Library Greater Public License (LGPL)
Send Feedback and Questions to:
Ryan Chute <[log in to unmask]>
Digital Library Research & Prototyping
Los Alamos National Laboratory, Research Library
tel. +1 505 665 6955