PurposeScopes enable people to focus, which is important as people's short-term memory is limited to 7 +/- 2 concepts (with attributes) [(Miller, 1956)](http://psychclassics.yorku.ca/Miller/). Hence, defining a scope - what is in it and what is not - is relevant as well.
a file that defines/specifies a scope.
: Miller, G. A. (1956). "The magical number seven, plus or minus two: Some limits on our capacity for processing information". Psychological Review. 63 (2): 81–97. CiteSeerX 10.1.1.308.8071. doi:10.1037/h0043158. PMID 13310704.