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Boolean Operators AND, OR, NOT

When you use the Simple Search, all terms are combined by AND automatically. For a more tightly focused search you may use the Boolean Operators to combine different search terms.

AND: The document has to contain all search terms.

OR: The document has to contain one of the search terms. This function broadens your search and is recommended, when there are different terms for the same meaning.

article OR paper

NOT: This function works excluding and might be useful to reduce a large result list: Documents, which contain the one term, may not contain the other.

article NOT paper

The Boolean Operators work for the Advanced Search as well. You may use them to combine different search terms within one search field. For example, to search for documents of the author "Doe" in the years 2002 or 2003, use the query:

Author: Doe
Year: 2002 OR 2003


In the field 'Search:', you may use the symbols '*' and '?' as wildcards. Use them in place of a character or characters that are unknown or that may differ. You cannot use them in front of a word or search string.

Example 1: chemi* finds chemical but also chemistry or chemist. Example 2: licen?e finds licence and license.

You may use double quotes (") to search for phrases.

I have some more questions - whom shall I contact?
Please contact the library bibliothek@zib.de, tel. -233

How do I publish my work here?
You will find information in the wiki “ZIB-Publications in OPUS”.


What's metadata?
Metadata can be defined as
  • data describing one or more ressources or as
  • data associated with an object and describing it
Basically metadata is describing documents, objects or services and contains information about their content, structure or form. More abstractly metadata is a description of data or "data about data". Bibliographic data sets and catalog entries in library catalogs can be seen as a kind of metadata.

This repository is using metadata in the Dublin Core Metedata Element Set (short Dublin Core (DC)) which has fifteen basic elements. Dublin Core is the result of international efforts to reach a collective consensus in describing electronic objects (in the broadest sense). The Library of Congress (LoC), the Online Cataloging Library Center (OCLC) and several national libraries are dealing with Dublin Core in many projects and are close to introduce the system respectively.

Secondary Publication Right – Guidelines for Publications at ZIB
Legal Framework
Since 1/1/2014, a new secondary publication right (Zweitveröffentlichungsrecht - ZVR) has been anchored in copyright law (§38), which extends the existing options for publication of preprints and postprints in OPUS by an additional one: It gives authors the right to publish certain pieces of work as second publication, even if this right is not stipulated in a publication agreement concluded with the publisher.

In this context, the following conditions are applicable (more detailed information (in German) under
„FAQ der Allianz der deutschen Wissenschaftsorganisationen“):
  • 12 months after primary publication, the accepted manuscript version – not the layout created by the publishing house – may be published in a repository. Any contrary agreement to the disadvantage of the author shall be invalid.
  • Only contributions in journals appearing at least twice a year may be published for a second time. This does not apply to contributions from monographs, festschrift, proceedings and the like.
  • The source of the primary publication must be mentioned.
  • The right does not apply retroactively, but only for publications since 2014.
  • All authors must give consent.
  • An additional granting of CC licences is not possible in order to avoid collisions with publishing contracts.

A secondary publication is still possible immediately as long as the publishing house has not contractually been granted an exclusive, but only a simple right of use, or if the publishing house in general permits subsequent use of this type. On this basis, ZIB Reports have already been published in the past. Among other things, all mathematical publishing houses allow preprints and postprints of publications to appear in an institutional repository or on a personal homepage. In particular, this option should be used for proceedings, since the second publication right newly incorporated into copyright law does not apply to proceedings, see above.

If contract conditions are not (or no longer) known to you, you can find the provisions of nearly all publishing houses in the SHERPA/ROMEO-database.

Publication in ZIB OPUS

(For a more detailed instruction on how to publish in OPUS, also refer to: ZIB Publications in OPUS))

All publications with publishing houses may also be published as ZIB Reports:

  • Preprints on the basis of the OA rules of publishing houses (refer to SHERPA/RoMEO database)
  • Postprints on the basis of the OA rules of publishing houses (refer to SHERPA/RoMEO database) or on the basis of the above-mentioned second publication right

The authors transfer a permanent, simple right of use to ZIB. The right of use includes providing public access as well as reproduction and storage.

It is not possible to make subsequent modifications in documents already published; in such cases, a new version is added. Documents already published will not be deleted from the server.

If publication by a publishing house is not intended, a free Creative Commons licence should be issued. We recommend licence CC-BY (for further information, see, e.g. Open Content – A practical guide to using Creative Commons Licences).
ZIB Reports are registered in the OPUS Repository of ZIB and are assigned a unique, permanently valid identifier (Persistent Identifier: URN) of the Deutsche Nationalbibliothek. The Deutsche Nationalbibliothek has, in addition, the legal mandate to permanently archive publications equipped with an URN.

Guidelines for authors of ZIB-Reports
Please ask the library for a ZIB-Report Number.

You will find all the details in the wiki “ZIB-Publications in OPUS”


Please make sure that the head of your department has accepted the article for publication. It is requested that the title page be formatted in ZIB-Style. Detailed information for preparing the pdf file is to be found in the Wiki


Fellows and guests should indicate their current affiliation on the title page. Funds or grants are to be noted too.

This document server is based on the repository software OPUS4 OPUS is documented here: http://opus4.kobv.de/.

Zuse Institute Berlin (ZIB)

Takustr. 7
D-14195 Berlin-Dahlem

Tel: +49 30 841 85-0
Fax: +49 30 841 85-125



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