Difference between revisions of "Standard Generalized Markup Language (SGML)"
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| − | '''The | + | == What is a Standard Generalized Markup Language (SGML)? == |
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| + | '''The Standard Generalized Markup Language (SGMl)''' as defined in ISO8879, is a language for defining markup languages. [[HTML (Hypertext Markup Language)|HTML]] is one such "application" of SGML. | ||
An SGML application consists of several parts: | An SGML application consists of several parts: | ||
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*The document type definition (DTD). The DTD defines the syntax of markup constructs. The DTD may include additional definitions such as numeric and named character entities. | *The document type definition (DTD). The DTD defines the syntax of markup constructs. The DTD may include additional definitions such as numeric and named character entities. | ||
*A specification that describes the semantics to be ascribed to the markup. This specification also imposes syntax restrictions that cannot be expressed within the DTD. | *A specification that describes the semantics to be ascribed to the markup. This specification also imposes syntax restrictions that cannot be expressed within the DTD. | ||
| − | *Document instances containing | + | *Document instances containing data (contents) and markup. Each instance contains a reference to the DTD to be used to interpret it.<ref>[https://www.w3.org/TR/WD-html40-970708/intro/sgmltut.html Definition - What is Standard Generalized Markup Language (SGML)? -W3.Org]</ref> |
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| + | ==See Also== | ||
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| + | ==References== | ||
| + | <references /> | ||
Latest revision as of 20:13, 3 January 2023
What is a Standard Generalized Markup Language (SGML)?
The Standard Generalized Markup Language (SGMl) as defined in ISO8879, is a language for defining markup languages. HTML is one such "application" of SGML.
An SGML application consists of several parts:
- The SGML declaration. The SGML declaration specifies which characters and delimiters may appear in the application.
- The document type definition (DTD). The DTD defines the syntax of markup constructs. The DTD may include additional definitions such as numeric and named character entities.
- A specification that describes the semantics to be ascribed to the markup. This specification also imposes syntax restrictions that cannot be expressed within the DTD.
- Document instances containing data (contents) and markup. Each instance contains a reference to the DTD to be used to interpret it.[1]