Well-formed XML

	Well-formed XML Well-formed or wellformed indicate syntactic correctness and may refer to: * Well-formedness, quality of linguistic elements that conform to grammar rules * Well-formed formula, a string that is generated by a formal grammar in logic * Well-formed element, web design element that is properly designed and ordered * Well-formed document, XML document that adheres to the syntax rules of the XML 1.0 specification * Well-formed Petri net, a Petri net class * Well-formed scale In music theory, a generated collection is a set (music), collection or scale (music), scale formed by repeatedly adding a constant interval (music), interval in integer notation, the generator, also known as an interval cycle, around the chromati ... , a class of musical scales {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Well-formedness __NOTOC__ In linguistics, well-formedness is the quality of a clause, word, or other linguistic element that conforms to the grammar of the language of which it is a part. Well-formed words or phrases are grammatical, meaning they obey all relevant rules of grammar. In contrast, a form that violates some grammar rule is ill-formed and does not constitute part of the language. A word may be phonologically well-formed, meaning it conforms to the sound pattern of the language. For example, the nonce word ''wug'' coined by Jean Berko Gleason is phonologically well-formed, so informants are able to pluralize it regularly. A word, phrase, clause, or utterance may be grammatically well-formed, meaning it obeys the rules of morphology and syntax. A semantically well-formed utterance or sentence is one that is meaningful. Grammatical well-formedness and semantic well-formedness do not always coincide. For example, the following sentence is grammatically well-formed, but has no clear m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Well-formed Formula In mathematical logic, propositional logic and predicate logic, a well-formed formula, abbreviated WFF or wff, often simply formula, is a finite sequence of symbols from a given alphabet that is part of a formal language. The abbreviation wff is pronounced "woof", or sometimes "wiff", "weff", or "whiff". A formal language can be identified with the set of formulas in the language. A formula is a syntactic object that can be given a semantic meaning by means of an interpretation. Two key uses of formulas are in propositional logic and predicate logic. Introduction A key use of formulas is in propositional logic and predicate logic such as first-order logic. In those contexts, a formula is a string of symbols φ for which it makes sense to ask "is φ true?", once any free variables in φ have been instantiated. In formal logic, proofs can be represented by sequences of formulas with certain properties, and the final formula in the sequence is what is proven. Alth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Well-formed Element In web page design, and generally for all markup languages such as SGML, HTML, and XML, a well-formed element is one that is either a) opened and subsequently closed, or b) an empty element, which in that case must be terminated; and in either case which is properly nested so that it does not overlap with other elements. For example, in HTML: word is a well-formed element, while is not, since the bold element is not closed. In XHTML, and XML, empty elements (elements that inherently have no content) are terminated by putting a slash at the end of the "opening" (only) tag, e.g. etc. In HTML 4.01 and earlier, no slash is added to terminate the element. HTML5 does not require one, but it is often added for compatibility with XHTML and XML processing. In a well-formed document, * all elements are well-formed, and * a single element, known as the root element, contains all of the other elements in the document. For example, the code below is not well-formed HTML, because ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Well-formed Document A well-formed document in XML is a document that "adheres to the syntax rules specified by the XML 1.0 specification in that it must satisfy both physical and logical structures". Requirements At its base level well-formed documents require that: * Content be defined. * Content be delimited with a beginning and end tag * Content be properly nested (parents within roots, children within parents) To be a well-formed document, rules must be established about the declaration and treatment of entities. Tags are case sensitive, with attributes delimited with quotation marks. Empty elements have rules established. Overlapping tags invalidate a document. Ideally, a well-formed document conforms to the design goals of XML. Other key syntax rules provided in the specification include: * It contains only properly encoded legal Unicode characters. * None of the special syntax characters such as < and & appear except when performing their markup-delineation roles. * The begin, end, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Well-formed Petri Net In high level mathematical theory, well-formed Petri nets are a Petri net class jointly elaborated between the University of Paris 6 (Université P. & M. Curie) and the University of Torino in the early 1990s. It is a restriction of the high-level nets (or colored Nets) introduced by K. Jensen. The main advantage of Well Formed Nets is the notion of symbolic reachability graph that is composed of ''symbolic states''. A symbolic state is a state representing several concrete states in the state space of the system described by the Petri net. So, much larger state spaces can be represented (the gain factor can be up to exponential). This notion of symbolic state space requires that only a limited set of operators are available (identify, broadcast, successor and predecessor functions are allowed on circular finite types). References * G. ChiolaCharacterization of timed well-formed Petri nets behavior by means of occurrence equations ''Proceedings of the Sixth International Worksho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]