Is XML based on SGML?
Like HTML, XML is based on SGML. The difference between the two, very simply put, is that XML merely describes a syntax for markup: the names of the tags are not set in concrete and authors can “invent” them as appropriate.
Why is XML better than SGML?
XML delivers the power of SGML without the complexity. XML does not utilize features that make the authoring difficult or costly. Yet XML preserves most of the flexibility and richness associated with SGML. Web browsers use a combined parsing and presentation engine that is tolerant of markup problems.
What is SGML full form?
The Standard Generalized Markup Language (SGML, defined in [ISO8879]), is a language for defining markup languages. HTML is one such “application” of SGML.
What are SGML files?
The SGML file extension is a document file that is written in Standard Generalized Markup language, abbreviated as SGML. Similar to XML file extensions, SGML files are being referenced as Document Type Definition or DTD files. These types of files describe the tags found within the document.
What is difference between SGML and XML?
What is the difference between XML and SGML? While XML is a markup language that is used to transfer data and text between driver hardware, operating systems and applications, SGML is an ISO standard for specifying a document markup language or a set of tags.
Is HTML derived from SGML?
The language that this Web browser uses, Hypertext Markup Language (HTML), is an example of an SGML-based language. There is a document type definition for HTML (and reading the HTML specification is effectively reading an expanded version of the document type definition).
Where is SGML used?
SGML can be used for publishing in its broadest definition – from single medium conventional publishing on paper to on-line multi-media database publishing. SGML can be used to produce files which can be read by people, and exchanged between machines and applications in a straightforward manner.
What is the difference between SGML and XML?
What is the difference between HTML and SGML?
HTML is the standard markup language for creating web pages and web applications. SGML is a standard for defining generalized markup languages for documents. That is the key difference between HTML and SGML.
What is the basic structure of an XML document?
An XML document consists of three parts, in the order given: An XML declaration (which is technically optional, but recommended in most normal cases) A document type declaration that refers to a DTD (which is optional, but required if you want validation) A body or document instance (which is required)