Subject: [xsl] What is the "closure" of a function? From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Fri, 23 May 2014 20:28:19 -0000 |
The Functions and Operators 3.0 recommendation (http://www.w3.org/TR/xpath-functions-30/) uses the term "closure" of a function: "In effect, the static and dynamic part of the context thus act as part of the closure of the function item." However, there is no formal definition of "closure". A search for "closure " in the Data-Model 3.0" Recommendation yields 0 results. However, the XDM defines the so called "nonlocal variable bindings": "nonlocal variable bindings (a mapping from xs:QName to item()*): This provides a value for each of the function's free variables (i.e., variables referenced by the function's implementation, other than locals and parameters)." My question is: Is it safe to assume that what is referred to as the "closure" property of functions in the F & O document is the same as the "nonlocal variable bindings" property of functions, defined in the XDM? -- Cheers, Dimitre Novatchev --------------------------------------- Truly great madness cannot be achieved without significant intelligence. --------------------------------------- To invent, you need a good imagination and a pile of junk ------------------------------------- Never fight an inanimate object ------------------------------------- To avoid situations in which you might make mistakes may be the biggest mistake of all ------------------------------------ Quality means doing it right when no one is looking. ------------------------------------- You've achieved success in your field when you don't know whether what you're doing is work or play ------------------------------------- To achieve the impossible dream, try going to sleep. ------------------------------------- Facts do not cease to exist because they are ignored. ------------------------------------- Typing monkeys will write all Shakespeare's works in 200yrs.Will they write all patents, too? :) ------------------------------------- I finally figured out the only reason to be alive is to enjoy it.
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