By Jianyang Zhou
"The NCL typical Constraint Language"presents the NCL language that's an outline language in traditional mathematical common sense for modeling and fixing constraint delight difficulties. NCL differs from different declarative languages: It versions difficulties certainly in a simplified kind of first-order good judgment with quantifiers, Boolean good judgment, numeric constraints, set operations and logical services; it solves difficulties by means of combined set programming over the combined area of genuine numbers, integers, Booleans, dates/times, references, and particularly units. The publication makes use of lots of examples and tutorials to demonstrate NCL and its purposes. it truly is meant for researchers and builders within the fields of common sense programming, constraint programming, optimization, modeling, operations learn and synthetic intelligence, who will study from a brand new programming language and theoretical foundations for business applications.
Dr. Jianyang Zhou is the inventor of NCL and has labored for its industrialization for greater than 10 years.
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Extra info for The NCL Natural Constraint Language
In particular for a compound statement, an included file can be included verbatim into the program; a custom message (a string expression) can be associated to a sequence of statements so that a personalized message can be given when a constraint in the statements fails. Similarly, a Boolean expression bool can be associated to a sequence of statements so that constraints involved in the statements become “soft”. In other words, such constraints will not fail if the Boolean expression bool is not false.
6} The symbols ӡ and Ӣ signify operators for global intersection and global union of sets. For ӡrefset and Ӣrefset, set expression refset is restricted to be a set of set references. They compute respectively the global union and global intersection of the set expressions referenced in refset. The collection operations ^ index integral` and ^ doubleidx integral` signify respectively sets of integrals collected by the universal quantification. n2] is available for integer and date/time sets. It signifies the subset (elements from n1-th to n2-th) of set.
Float Format floatformat o (decimallen , alignment) decimallen o int For a float expression float, a format option in the form of (decimallen, alignment) can be given. Here decimallen determines the number of digits after the decimal point, and alignment tells the whole length and alignment style of float. Date/Time Format dtimeformat o | | | | | | | | "dd/mm/yyyy hh" "mm/dd/yyyy hh" "yyyy-mm-dd hh" "dd/mm/yyyy hh:mm" "mm/dd/yyyy hh:mm" "yyyy-mm-dd hh:mm" "dd/mm/yyyy hh:mm:ss" "mm/dd/yyyy hh:mm:ss" "yyyy-mm-dd hh:mm:ss" | "dd/mm/yyyy" 3 Grammar and Semantics 43 | | | "mm/dd/yyyy" "yyyy-mm-dd" "yyyymmdd" | | | "hh" "hh:mm" "hh:mm:ss" | "" An input or an output can be of date/time format.
The NCL Natural Constraint Language by Jianyang Zhou