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An SM expression is something that can appear on the right hand side of a SET command. More specifically, it is something that can appear as part of the right hand side of a SET command (this excludes implied do loops: SET x=1,10,2 ). Expressions may also appear in other contexts, such as in the ANGLE command, or in DEFINE name ( expression ) . A formal definition of an expression is given by the YACC grammar in `control.y' as the non-terminal symbol expr .
출처: www.phys.unm.edu/~rjr/sm/sm_21.html
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An expression is evaluated to yield an object, which has one of the following four basic types; a node-set, a boolean, a number or a string. Expressions are used in XSLT for a variety of purposes including: Selecting nodes for processing; Specifying conditions for different ways of processing a node; Generating text to be inserted in the result tree.
출처: www.dpawson.co.uk/xsl/xslvocab.html
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Specification of the action to perform, comprising a search method and parameters. Expression can be one of the following types: Pattern Expression, Filter Expression, or Operator Expression (Figure. Simple query construct.) The search method is the code executed when the Expression is evaluated.
출처: www.sdsc.edu/pb/mmql/mmql_1_4.html
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The process by which a gene's coded information is converted into the structures present and operating in the cell. Expressed genes include those that are transcribed into mRNA and then translated into protein and those that are transcribed into RNA but not translated into protein (eg, transfer and ribosomal RNAs).
출처: www.mcn.org/2/noel/DNA-Dictionary.htm
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