View source for Coverage (information systems)

{{More footnotes needed|date=February 2021}}

The '''Coverage''' of an [[Information system]] is a criterion for the completeness of the records in the information system.
It is defined as the ratio of the number of [[Instance (computer science)|instances]]/[[Record (computer science)|records]] in the system (mostly implemented as a [[Database]]) that represent real world [[Entity class|entities]]  and the number of entities that exist (in the real world) and should be represented in the information system according to its [[Intention|purpose]].

Example: If there are 170 countries in the world and an information system holds 153 country records then the coverage of countries of this information system is 90%.

== Bibliography ==
* https://www.phil-fak.uni-duesseldorf.de/fileadmin/Redaktion/Institute/Informationswissenschaft/stock/271.pdf
* {{cite journal | last1=Hood | first1=William W. | last2=Wilson | first2=Concepción S. | title=Informetric studies using databases: Opportunities and challenges | journal=Scientometrics | publisher=Springer Science and Business Media LLC | volume=58 | issue=3 | year=2003 | issn=0138-9130 | doi=10.1023/b:scie.0000006882.47115.c6 | pages=587–608| s2cid=12388738 }}
* {{cite journal | last1=Naumann | first1=Felix | last2=Freytag | first2=Johann-Christoph | last3=Leser | first3=Ulf | title=Completeness of integrated information sources | journal=Information Systems | publisher=Elsevier BV | volume=29 | issue=7 | year=2004 | issn=0306-4379 | doi=10.1016/j.is.2003.12.005 | pages=583–615| url=http://edoc.hu-berlin.de/18452/9840 }}

[[Category:Information systems]]
[[Category:Information]]