Searchable Sites
Internet co-operative bibliographic retrieval networks are widely in use in scientific libraries. They allow to search local site and/or the search in remote sources and repositories.
The Virtual Library veterinary Medicine ViFaVet ( http://elib.tiho-hannover.de/virtlib/index-e.html) represents a browseable and searchable (arranged in various categories) directory of online resources. It provides searchability within the site based on a PHP – Awanti – Allegro framework as well as the veterinary search engine anuvet for remote Z39.50 supporting databases.
Z 39.50
The Z39.50 protocol connects the TCP/IP protocol stack and the client front end interface. Z39.50 consists of basic structural blocks (Initialisation, search, Retrieval, Sort, etc) for the communication between the origin and the target (Z-client-Z-server). The Z39.50 protocol represents a widespread database search mechanism on the Internet. To make the database searchable, the Z39.50 target must be installed at the database server. The anuvet search engine implements this protocol.
Web services
Web services provide access to the Information on the Internet where the applications interact directly with the web services.
The information is exchanged within the basic messaging protocol for Web services framework of SOAP, via HTTP in XML encoding. A SOAP end point is identified by a URL. SOAP methods are XML element declaration.
SOAP toolkits are available in Perl, Java, Python and other programming languages.
Currently we are implementing web services into ViFaVet to embed it in the portal of all virtual libraries in Germany under www.vascoda.de. Our own Catalogues and full text journals are already included in vascoda.
OAI
The Open Archive Initiative (OAI) (www.openarchives.org, www.oaforum.org) is developing a framework for distributed archives. The OAI format is an XML-based protocol for harvesting metadata.
In ViFaVet we are implementing the DSpace system (http://dspace.org) to create the repositories of technical reports and as a next step – institutional dissertations. DSpace implements both the Open Archival Information Systems (OAIS) reference model and the Open Archives Initiative’s Protocol for Metadata harvesting (OAI PMH). DSpace supports the submission of digital material directly by its creators and has searching and browsing facilities.
Open Link
Open Link is based on the Dublin Core Documents description. Examples are SFX and LinkSolver. We are preparing to implement open link tools.
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