HTML exploited SGML's allowing some elements to omit start- or end-tags. Learn more about hiring developers or posting ads with us
(3) What differences are between saying one language is an application of another, and one language is a subset of another?There are documents that conform with both XML and HTML; there are documents that conform with XML and not HTML, and there are documents that conform with HTML and not XML. The best answers are voted up and rise to the top
Featured on Meta "html" is not based on any specific serialization standard anymore, it has its own complete serialization.Herein lies the difference: HTML4 has a "sgml" serialization and "xml" serialization (called XHTML 1.0) XHTML initially held the promise of being useful for storage, transfer and display of data. Suffice it to say that XHTML borrows concepts from XML and is used as a strict subset of HTML. SGML is a system for defining structured document types, and markup languages to represent instances of those document types. Subsets of XML include XSL and XSLT. XML is neither a presentation language nor a programming language. If you wish to pass data between two systems, XML is often the way to do it.If, for example, you needed to pass a sales order from your website to your billing system, you could create this XML payload:Your website would then send that XML to your billing system, which could then parse the data from that XML.XHTML and HTML are obviously just for web pages.
XHTML came afterwards.Thanks! XML is not a metalanguage for defining markup languages. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under SGML, but HTML is a markup language while XML is not a markup The SGML declaration for HTML is given in SGML Declaration for HTML.
XML can define applications of its own.
XML is a pared-down, or light, version of SGML, designed to work with limited bandwidth. Anybody can ask a question Errors are easier to find and as a bonus it will also be valid XML. You already have seen XHTML Differences Between HTML vs HTM. (1) How about the meaning of and difference between "application", "subset" and "profile", as in Part 5 of my questions? I'll try to keep it short and simple.SGML evolved from GML (Generalized Markup Language) which was devised by 3 IBM engineers in the 1960s as a means of storing elaborate legal, government, industrial and military documents. They are all different. HTML is limited to design and does not have subsets or applications. HTML is loose with tags and there is a set number of different tag types. Generally in the standards world, a "profile" of a standard is a selection of options that the standard offers: for example, if the standard allows documents to be encoded in UTF-8 or UTF-16, a profile of the standard might require them to be encoded in UTF-8. In this family of markup languages, Standard Generalized Markup Language (SGML) is the parent. HTML is a presentation language. Start here for a quick overview of the site
also syntactically correct and semantically the same as in the SGML can be considered to be the mother language of HTML and XML, which are now widely used for transcribing digital documents.
I hope it helps you distinguish the meaning and purpose of them all. HTML is an application conforming to International Standard ISO 8879 -- Standard Generalized Markup Language (SGML). Do HTML and XML have nonempty intersection, or totally separated from each other?
However, much of what defines these languages is their restrictions on SGML.You may find this document helpful, although the technical terms may be hard to digest.