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Hi Dasos, You may be interested to try J-ISIS. It uses Berkeley DB as key/value NoSQL database and Lucene for indexing records. https://kenai.com/projects/j-isis https://kenai.com/projects/j-isis/downloads/download/jisis_suite%2024%20June%202013.zip https://kenai.com/downloads/j-isis/J-ISIS%20Reference%20Manual%2024%20June%202013.pdf J-ISIS uses the MARC record concepts. Data elements are stored in *fields*, each of which is assigned a numeric *tag* indicative of its contents. You may think of the tag as the name of the field as it is known by J-ISIS. The collection of fields containing all data elements of a given unit of information is called a *record*. A field may be optional (i.e. it may be absent in one or more records), it may contain a single data element, or two or more variable length data elements. In the latter case the field is said to contain *subfields*, each of which is identified by a 2-character *subfield delimiter* preceding the corresponding data element. Furthermore a field may be *repeatable*, i.e. any given record may contain more than one instance or *occurrence*, of the field. You can import/export UNIMARC, MARC21, MarcXML, ISO2709, MODS data with different encoding. Once data is loaded in the database, you can index the database, browse, update and search the database. (and much more) J-ISIS is yet under development but is becoming more mature with the last 24 June 2013 release. The Web version is also under development, you can read Web-JISIS document to have an idea. https://kenai.com/projects/j-isis/downloads/download/Web-JISIS.pdf Hope it can help. Best wishes, Jean-Claude Dauphin On Fri, Jul 5, 2013 at 11:47 AM, dasos ili <[log in to unmask]> wrote: > Could you please give us any suggestions on a data model example regarding > a MARC record? The goal is to be able to store it in mongodb, in an > efficient way so as to get results with the appropriate queries. > > thank you in advance > > -- Jean-Claude Dauphin [log in to unmask] [log in to unmask] http://kenai.com/projects/j-isis/ http://www.unesco.org/isis/ http://www.unesco.org/idams/ http://www.greenstone.org