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Python sets are very much like mathematical sets, and support operations like set intersection and union. Python also features a frozenset class for immutable sets, see Collection types. Dictionaries (class dict) are mutable mappings tying keys and corresponding values. Python has special syntax to create dictionaries ({key: value})
Before version 3.0, Python had two kinds of classes (both using the same syntax): old-style and new-style; [113] current Python versions only support the semantics of the new style. Python supports optional type annotations. [4] [114] These annotations are not enforced by the language, but may be used by external tools such as mypy to catch errors.
to the end of the template code, making sure it starts on the same line as the code's last character. This category is for article-related templates that improve Wikipedia's use of Web semantics. For background information on the concept of Web semantics (meaningful markup, as opposed to pure presentation/display), see:
This template's initial visibility currently defaults to collapsed, meaning that it is hidden apart from its title bar. To change this template's initial visibility, the |state= parameter may be used: {{Semantic markup templates | state = expanded}} will show the template expanded, i.e. fully visible.
For example, the extension of a function is a set of ordered pairs that pair up the arguments and values of the function; in other words, the function's graph. The extension of an object in abstract algebra, such as a group, is the underlying set of the object. The extension of a set is the set itself.
In any of several fields of study that treat the use of signs — for example, in linguistics, logic, mathematics, semantics, semiotics, and philosophy of language — an extensional context (or transparent context) is a syntactic environment in which a sub-sentential expression e can be replaced by an expression with the same extension and without affecting the truth-value of the sentence as ...
RDF represents information using semantic triples, which comprise a subject, predicate, and object. Each item in the triple is expressed as a Web URI. Turtle provides a way to group three URIs to make a triple, and provides ways to abbreviate such information, for example by factoring out common portions of URIs.
Presentation software that supports free form placement and zooming on a single sheet; Offers Android, iPhone and iPad applications work both offline and in sync with the cloud; Qiqqa: Quantisle Ltd. Windows: Minds maps for academics oriented around their research papers, notes and annotations: Semantica: Semantic Research OS X, Windows