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  2. CSS - Wikipedia

    en.wikipedia.org/wiki/CSS

    To demonstrate specificity Inheritance Inheritance is a key feature in CSS; it relies on the ancestor-descendant relationship to operate. Inheritance is the mechanism by which properties are applied not only to a specified element but also to its descendants. Inheritance relies on the document tree, which is the hierarchy of XHTML elements in a page based on nesting. Descendant elements may ...

  3. RDFa - Wikipedia

    en.wikipedia.org/wiki/RDFa

    RDFa was defined in 2008 with the "RDFa in XHTML: Syntax and Processing" Recommendation. [16] Its first application was to be a module of XHTML.. The HTML applications remained, "a collection of attributes and processing rules for extending XHTML to support RDF" expanded to HTML5, are now expressed in a specialized standard, the "HTML+RDFa" (the last is "HTML+RDFa 1.1 - Support for RDFa in ...

  4. Bootstrapping (statistics) - Wikipedia

    en.wikipedia.org/wiki/Bootstrapping_(statistics)

    The bootstrap sample is taken from the original by using sampling with replacement (e.g. we might 'resample' 5 times from [1,2,3,4,5] and get [2,5,4,4,1]), so, assuming N is sufficiently large, for all practical purposes there is virtually zero probability that it will be identical to the original "real" sample. This process is repeated a large ...

  5. Two-dimensional conformal field theory - Wikipedia

    en.wikipedia.org/wiki/Two-dimensional_conformal...

    For example, a four-point function can be written in terms of conformal blocks in three inequivalent ways, corresponding to using the OPEs (s-channel), (t-channel) or (u-channel). The equality of the three resulting expressions is called crossing symmetry of the four-point function, and is equivalent to the associativity of the OPE.

  6. Jackknife resampling - Wikipedia

    en.wikipedia.org/wiki/Jackknife_resampling

    This simple example for the case of mean estimation is just to illustrate the construction of a jackknife estimator, while the real subtleties (and the usefulness) emerge for the case of estimating other parameters, such as higher moments than the mean or other functionals of the distribution.

  7. HTML element - Wikipedia

    en.wikipedia.org/wiki/HTML_element

    An HTML element is a type of HTML (HyperText Markup Language) document component, one of several types of HTML nodes (there are also text nodes, comment nodes and others). [vague] The first used version of HTML was written by Tim Berners-Lee in 1993 and there have since been many versions of HTML.

  8. Purchase order - Wikipedia

    en.wikipedia.org/wiki/Purchase_order

    An example of a purchase order request from a travel agent. A purchase order, often abbreviated to PO, is a commercial document issued by a buyer to a seller, indicating types, quantities, and agreed prices for products or services required. [1] It is used to control the purchasing of products and services from external suppliers. [2]

  9. Dance positions - Wikipedia

    en.wikipedia.org/wiki/Dance_positions

    Most all leg movements begin from, and end at, these five positions: [4] First position: This is the main ballet position, and for most beginners, it is the basic position to start from. In this standing position, the dancer’s feet remain connected at the heels, with the toes turned out at a 90-degree angle, or greater. In this position, the ...