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An image sometimes includes a familiar object to communicate scale. Such fiducial markers should be as culturally universal and standardized as possible: rulers, matches, batteries, pens/pencils, footballs (soccer balls), people and their body parts, vehicles, and famous structures such as the Eiffel Tower are good choices, but many others are possible.
The text in the alt attribute is used to replace the image when the image cannot be loaded, without changing the intended meaning of the page's contents. [8] The W3C's web content accessibility guidelines state that the alt attribute is used to convey the meaning and intent of the image, rather than being a literal description of the image ...
If an article overall has so many images that they lengthen the page beyond the length of the text itself, you can use a gallery; or you can create a page or category combining all of them at Wikimedia Commons and use a relevant template ({}, {{Commons category}}, {{Commons-inline}} or {{Commons category-inline}}) to link to it instead, so that ...
When the image is a link, screen readers will read out the link filename (e.g., "slash green underscore tick") if the HTML alt attribute is empty or missing. Nearly all images in Wikipedia articles are links to the image description page, which contains a larger size version of the image, as well as licensing and attribution information. [Note 1]
An HTML document is composed of a tree of simple HTML nodes, such as text nodes, and HTML elements, which add semantics and formatting to parts of a document (e.g., make text bold, organize it into paragraphs, lists and tables, or embed hyperlinks and images). Each element can have HTML attributes specified. Elements can also have content ...
HTML element content categories. HTML documents imply a structure of nested HTML elements. These are indicated in the document by HTML tags, enclosed in angle brackets thus: < p >. [73] [better source needed] In the simple, general case, the extent of an element is indicated by a pair of tags: a "start tag" < p > and "end tag" </ p >. The text ...
HTML attributes are special words used inside the opening tag to control the element's behaviour. It is a piece of markup language used to adjust the behavior or display of an HTML element.HTML attributes are a modifier of a HTML element type. An attribute either modifies the default functionality of an element type or provides functionality to ...
A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...