XHTML 1.0 - Differences with HTML 4 - W3 HTML 4 defined the name attribute for the elements a, applet, form, frame, iframe, img, and w3.org does not complain when the xmlns attribute is missing. element attributes. Be aware that processing instructions are rendered on some user agents. Within the XHTML namespace, user agents are expected to recognize the "id" attribute as an attribute of type ID. modification as both media types: In HTML 4 and XHTML, the style element can be used to define document-internal style rules. SGML gives the writer of a DTD the ability to exclude specific elements from being contained within an element. Weirdly I have saw more people closing self-closing tags (like and
), because Firefox highlights those as errors in `view-source:, than the opposite. Attribute names such as compact and Essentially this means that all elements must Many existing HTML clients don't support the use of ID-type attributes in this way, so identical values may be supplied for both of these attributes to ensure Visit Mozilla Corporations not-for-profit parent, the Mozilla Foundation.Portions of this content are 19982023 by individual mozilla.org contributors. model specifies that HTML element and attribute names are returned in upper-case. In XHTML-conforming user agents, the value of the encoding declaration of the XML declaration takes precedence. characters, it is illegal. Attributes To validate it properly requires having to know all possible elements and their optional rules, including browser specific extensions. A. source B. src C. xmlns D. link Answer & Solution Discuss in Board Save for Later 18. Unfortunately, this constraint cannot be expressed in the XHTML 1.0 DTDs. For further information on using media types compliant with HTML 4. Attributes however, comes at a price, and that price is a level of complexity that has inhibited its adoption in a diversity of environments, including the World Wide Web. HTML attribute: min. The Cascading Style Sheets level 2 Recommendation [CSS2] defines style properties which are applied to the parse tree of the HTML or XML WebAttributes should be quoted Tags should nest not tag Unused elements may be minimized Unknown attributes are ignored by the browser. Thats how I feel about it, anyway. However, selector syntax. Attributes like autocomplete and disabled are very different from each other and cannot really be handled as a group. I love semantic HTML. Replace the name attribute with the id attribute. I believe this was first reported in #1058 In Critical Defense of Frontend Development., these attributevalue pairs to be omitted, a smaller payload also leading to faster sites. None of this is new our field could merely decide to rediscover it. I dont like the mindset that says you must know all the rules before you use the tools. Consistency is definitely the key, do what you want but stay consistent at least! Note: be aware that if a document must include the character encoding declaration in a meta http-equiv statement, that document may always be interpreted by HTTP servers and/or user agents as Say what you will, I will always use self-closing tags for elements without a closing tag. Means, it includes all the descending elements. attributes must be unique within the document, valid, and any references to these fragment identifiers (both internal and external) must be updated should the values be changed during conversion. Enjoy riding your hobby horse, but preferably dont present it as practical transport for those who just want to get to work. What is the XHTML way of writing HTML, and what is the HTML way of writing HTML?