[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: What is the relationship between transforming, mapping,and
The term "mapping" is generally used to mean an operation in which the same function f(x) is applied to every item x in some set (or sequence) of items X. The term "filtering" is generall used to mean an operation in which some predicate (boolean function) f(x) is applied to every item x in some set of items X, such that x is included in the result if f(x) is true, and excluded if it is false. Filtering using a function p(x) is equivalent to mapping using the function (if (p(x)) then x else ()). I'm not aware of any mathematically precise use of the term "transformation". An XSLT transformation is of course a function from input documents to output documents. Michael Kay Saxonica > On 31 Aug 2021, at 18:53, Roger L Costello <costello@mitre.org> wrote: > > Hi Folks, > > How do you define those terms? Are they synonymous? Is one a subset of another? > > By "mapping" I mean populating XML instances of one data standard with data from another data standard. For example, I am currently mapping a military air navigation data standard to a civilian air navigation data standard. > > By "filtering" I mean performing actions on data such as redacting, fuzzing, and zeroing. One could think of these actions as mapping: if I fuzz a lat/long location, I am essentially mapping the location to another location. > > By "transforming" I mean all the kinds of things you can do with XSLT. > > Is filtering a subset of mapping? Is mapping a subset of transforming? > > /Roger > > _______________________________________________________________________ > > XML-DEV is a publicly archived, unmoderated list hosted by OASIS > to support XML implementation and development. To minimize > spam in the archives, you must subscribe before posting. > > [Un]Subscribe/change address: http://www.oasis-open.org/mlmanage/ > Or unsubscribe: xml-dev-unsubscribe@lists.xml.org > subscribe: xml-dev-subscribe@lists.xml.org > List archive: http://lists.xml.org/archives/xml-dev/ > List Guidelines: http://www.oasis-open.org/maillists/guidelines.php >
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