Our document server: technical documentation

Technische Dokumentation

The E-LIB document server has been part of the State and University Library of Bremen’s electronic library program since 1998. The platform has been upgraded regularly to keep pace with technological developments and changing standards. In 2006, the E-LIB document server was awarded the DINI Certificate.

The hardware and software utilized to deliver this service is maintained and developed by the I.T. Department of the State and University Library Bremen (SuUB) within the framework of its E-LIB program. Please direct all questions regarding the document server to our Electronic Library Team.


The E-LIB document server is built around a VMware virtual machine with 1 x 2600 MHz CPU and 2 GB RAM. The server is linked to the DFN  through the University’s backbone via a GigaBit Ethernet connection. This set up allows operations to be continued on another physical host within the VM cloud during maintenance and unexpected service outages.

Data is stored on an external hard drive sub-system (Fabric Attached Storage – FAS) from NetApp (Network Appliance) with a RAID system to guarantee system stability and ensure that documents and database entries are protected. The document server uses NFS and iSCSI protocols to access the external hard drive sub-system.

BakBone’s NetVault software is used to create document and database backups on a separate secondary file server; from there data is transferred to an LTO storage facility in a D2D2T process.


The E-LIB document server operates on a SUSE Linux 9 OS and an Apache web server (V.2+) with PHP-DOM to process XML and XSLT documents. Metadata relating to documents stored on the server are indexed on a purpose-built XML flat file database and can be accessed through the http interface.

Open Archives Initiative (OAI)

A global standard interface (OAI-PMH) ensures that bibliographic metadata is accessible to providers of other search systems. Metadata can be harvested automatically through this OAI2.0 interface:


OAI-XML interface sample queries:

List Sets
List MetadataFormats
List Earth sciences and geology (DDC 550)
List Diss Biology, Chemistry

Contact us


Hotline Elektronisches Publizieren
Tel: (0421) 218 59415