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An entity–attribute–value model (EAV) is a data model optimized for the space-efficient storage of sparse—or ad-hoc—property or data values, intended for situations where runtime usage patterns are arbitrary, subject to user variation, or otherwise unforeseeable using a fixed design. The use-case targets applications which offer a large ...
A UUID is 128 bits in size, in which 2 to 4 bits are used to indicate the format's variant. The most common variant in use today, OSF DCE, additionally defines 4 bits for its version. The use of the remaining bits is governed by the variant/version selected.
In such situations, all or part of the data model may be expressed as a collection of 2-tuples in the form <attribute name, value> with each element being an attribute–value pair. Depending on the particular application and the implementation chosen by programmers, attribute names may or may not be unique.
URL is a useful but informal concept: a URL is a type of URI that identifies a resource via a representation of its primary access mechanism (e.g., its network "location"), rather than by some other attributes it may have. [19] As such, a URL is simply a URI that happens to point to a resource over a network.
The media type part may include one or more parameters, in the format attribute=value, separated by semicolons (;) . A common media type parameter is charset , specifying the character set of the media type, where the value is from the IANA list of character set names. [ 6 ]
Attribute values can be set-valued or atomic-valued. Set-valued attributes contain more than one atomic value. Examples are role and project. Atomic-valued attributes contain only one atomic value. Examples are clearance and sensitivity. Attributes can be compared to static values or to one another, thus enabling relation-based access control.
UTM parameters that are passed to URLs can be parsed by analytics tools such as Google Analytics and Adobe Analytics, with the data used to populate standard and custom analytics reports. [2] Web analytics software may attribute parameters to the browser's current and subsequent sessions until the campaign window has expired.
A query string is a part of a uniform resource locator that assigns values to specified parameters.A query string commonly includes fields added to a base URL by a Web browser or other client application, for example as part of an HTML document, choosing the appearance of a page, or jumping to positions in multimedia content.