HTML (Hypertext Markup Language) is the computer language that enables the separation of presentation and content. HTML is used to create webpages that can be viewed on the Internet. It is the foundation of all webpages and can be used to create complex websites. HTML consists of tags that are used to structure the content of a webpage. The content is stored in the HTML document, while the presentation is handled by a style sheet, such as CSS. By separating the content and presentation, HTML allows webpages to be easily updated and maintained.

Separation of content and presentation

Concept in technology design

An example of CSS code, which makes up the visual and styling components of a web page

Separation of content and presentation (or separation of content and style) and the separation of concerns design principle applied to authorship and presentation of content. Under this principle, the visual and design aspects (presentation and style) are separated from the main material and structure (content) of a document. A typical analogy used to explain this principle is the distinction between the human skeleton (as a structural component) and human flesh (as a visual component) that make up the appearance of the body. Common applications of this principle are seen in web design (HTML against css) and document composition (Lambert’s document[clarify] body vs. its preamble).

Usage in web design

This principle is not a rigid guideline, but serves more as a best practice to keep the look and structure separate. In many cases, the Project and development Aspects of a project are performed by different people, so keeping the two aspects separate ensures upfront production accountability and later simplification of maintenance, as in don’t repeat yourself (DRY).

Use in composing documents

Latex is a document markup language that focuses primarily on the content and structure of a document. When a document is prepared using the LaTeX system, the source code of the document can be divided into two parts: the body of the document and the preamble (and stylesheets). The body of the document can be compared to the body of an HTML document, where the content and structure of the document is specified, while the preamble (and style sheets) can be compared to the CSS part of an HTML document, where the formatting, document specifications and other visual attributes are specified.

Under this methodology, academic writings and posts can be structured, styled, and composed with minimal effort by their creators. In fact, it also saves end users – who are generally not trained as designers – from switching between adjusting formatting and working on the document itself. Similar to the case with HTML and CSS, the separation between content and style also allows a document to be quickly reformatted for different purposes, or a style to be reused across multiple documents as well.

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References


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