case sensitivity

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case sensitivity

Whether a text matching operation distinguishes upper-case (capital) letters from lower case (is "case sensitive") or not ("case insensitive").

Case in file names should be preserved (for readability) but ignored when matching (so the user doesn't have to get it right). MS-DOS does not preserve case in file names, Unix preserves case and matches are case sensitive.

Any decent text editor will allow the user to specify whether or not text searches should be case sensitive.

Case sensitivity is also relevant in programming (most programming languages distiguish between case in the names of identifiers), and addressing (Internet domain names are case insensitive but RFC 822 local mailbox names are case sensitive).

Case insensitive operations are sometimes said to "fold case", from the idea of folding the character code table so that upper and lower case letters coincide. The alternative "smash case" is more likely to be used by someone who considers this behaviour a misfeature or in cases where one case is actually permanently converted to the other.

"MS-DOS will automatically smash case in the names of all the files you create".
References in periodicals archive ?
The bank said that its system, which was recently revamped, had 'increased complexity including case-sensitivity.
0 include video cataloging, indexing, and publishing to the Web; customizable players that dynamically display media content on demand; export/import of textual information into a metadata index; an Auto-Segmentation module that lets users segment transcripts using time- and case-sensitivity as criteria; XML export that allows the reuse of media metadata by other search engines; support for industry-standard databases such as Oracle and SQL Server; and compliance with the federally mandated Section 508 of the Rehabilitation Act.
However, this case-sensitivity issue only becomes a problem when the authors of Web pages code their HTML sloppily.
ProductCenter BOM Export - The ProductCenter BOM Export resources has been expanded to control find number generation, BOM sort order, and part number case-sensitivity for greater flexibility when generating the BOM from the CAD assembly hierarchy.
BRU Server for Mac OS X provides 100% coverage of all Mac OS X file attributes without limitation, including support of case-sensitivity under the new 10.