r2 - 31 Oct 2006 - 20:22:48 GMT - FriederSchmidtYou are here: Bernstein > Main Web >  SystemsIntegration > UseCaseRequirements > UseCaseList > DbSearchWatermarkTwins

Databases search Watermark Twins

This is part of the submitted UseCaseList.


Each mould belongs to a pair of moulds. So “watermarks a twins” (Allan Stevenson). In a ream of paper there are sheets produced with both moulds in a proportion nearly 50:50. In the printed Piccard these twins are signed with letter “A” resp. “B” (cf. e.g. “Wasserzeichen Hand und Handschuh”, no. 31 and 32, 42, and 48, 51 and 54, 59 and 60, 71 and 75...) Obviously this is a very important relation. User should be able to search for those twins.


How important do you see this use case as?

  • Strongly desired


What other use cases are affected by the implementation of this one?

  • Databases integration


Things that the user must/might supply to the system.

  • [Mandatory] Input Description
  • Question: Does there exist an “A” resp. “B” case corresponding with a specific watermark described in one of the databases
  • Question: Please show all watermark tuples matching specific restrictions (watermark, time, region, paper grade etc.)


Things that the user will receive in response to their request.

  • negative report or
  • both watermarks corresponding (image and character data)
  • a list of tuples matching the criteria


Areas in which you foresee problems/issues arising.

  • How to bring together tuples in two different databases?


An example supporting this use case.

  • See above Piccard examples

Other Information

Any other information that you think is important to include.

  • You have much better chances to find these watermark twins in manuscript than in printed books, caused by the specific way how to write in a scriptorium and how to print in a printers' shop.
  • Stevenson 1951/52. - Stevenson, Allan Henry: Watermarks are twins / Allan H. Stevenson. - In: Studies in bibliography. - Charlottesville 4 (1951/52). - pp. 47-91.


Comment from other partner regarding the use case.

  • ...

-- FriederSchmidt - 31 Oct 2006

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