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NEWCONNECTIVE
- Syntactic framework. That it framework defines the newest components to possess indicating the newest certified presentation syntax out-of RIF reasoning languages by the concentrating the newest presentation syntax of your own framework. The new demonstration syntax is employed when you look at the RIF so you’re able to describe https://datingranking.net/tr/xdating-inceleme/ the newest semantics of languages and also to show part of the ideas which have examples. So it syntax isn’t supposed to be a tangible sentence structure to possess the fresh new dialects; it simply leaves aside details such as the delimiters of the numerous syntactic portion, parenthesizing, precedence from operators, etc. Once the RIF try a keen interchange structure, they spends XML as its only real sentence structure.
- Semantic framework. The fresh new semantic design makes reference to the fresh components that are employed for indicating brand new varieties of RIF logic languages.
- XML serialization construction. Which build describes the overall standards you to logic languages are to use in specifying their concrete XML-based syntaxes. For every single dialect, the tangible XML sentence structure try a derivative of dialect’s speech sentence structure. It could be thought to be a serialization of the sentence structure.
NEWCONNECTIVE
- Constants and you will parameters. These terms and conditions are to the majority reason dialects.
- Positional terminology. This type of terms can be used in very first-acquisition reason. RIF-FLD defines positional terminology inside a slightly even more standard ways inside the buy to allow languages having large-acquisition syntax, including HiLog [CKW93] and you may Relfun [RF99].
- Terms having named objections. Talking about including positional words other than each dispute of a title is called while the acquisition of the objections was immaterial. Terms that have entitled objections generalize the very thought of rows in the relational tables, where line headings correspond to conflict brands.
- Lists. Such terms and conditions match listing for the reason coding, and are utilized in the basic Reason Dialect. Minimal sizes ones terminology can be used from the Core Dialect and the Production Legislation Dialect.
- Frames. A frame label means a denial in the an object and its properties. This type of terminology correspond to particles off F-logic [KLW95]. There clearly was syntactic similarity ranging from conditions with named arguments and you can frames, since functions (otherwise characteristics) regarding an item be like called arguments. Although not, this new semantics of these terms are different (find Part Semantic Formations).
- Class. These terminology are used to identify brand new subclass and you can class registration relationship. There are 2 types of category words: registration words and subclass terms and conditions. Such as structures, these types of terms had been lent away from F-reasoning [KLW95].
- Equality. Such terms and conditions are acclimatized to associate almost every other terminology.
pred:numeric-equal or pred:boolean-equivalent). Those predicates have fixed interpretations, which coincide with the interpretation of the equality terms defined in this document when the latter are evaluated over data types. General use of equality terms is supported in systems such as FLORA-2 [FL2], and special cases are also allowed in Relfun [RF99].
Terms are then used to define several types of RIF-FLD formulas. RIF dialects can choose to permit all or some of the aforesaid categories of terms. In addition, RIF-FLD introduces extension points, one of which allows the introduction of new kinds of terms. An extension point is a keyword that is not a syntactic construct per se, but a placeholder that is supposed to be replaced by specific syntactic constructs of an appropriate kind. RIF-FLD defines several types of extension points: symbols (NEWSYMBOL), connectives (), quantifiers (NEWQUANTIFIER), aggregate functions (NEWAGGRFUNC), and terms (NEWTERM).
Although not, beyond your investigation sizes, the fresh interpretation of your equivalence conditions may vary which will be computed by the belongings in RIF files
Icon rooms partition the new group of low-analytical icons you to match personal constants, predicates, and functions, each partition will be given its semantics. An icon place possess an enthusiastic identifier and you will an effective lexical space, which represent brand new “shape” of the symbols in this symbol area. Specific icon rooms in RIF are accustomed to identify Online agencies in addition to their lexical area include chain you to definitely syntactically appear to be internationalized resource identifiers [RFC-3987], otherwise Iris (elizabeth.grams., Other icon rooms are widely used to depict the fresh datatypes required by RIF (such as for example,