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  2. Help:Markup validation - Wikipedia

    en.wikipedia.org/wiki/Help:Markup_validation

    For instance, in most HTML and XHTML document types the "type" attribute is required on the "script" element and the "alt" attribute is required for the "img" element.... This diagnostic can result from use of the EasyTimeline extension, which does not support accessibility and does not generate alternative text for visually impaired readers.

  3. HTML attribute - Wikipedia

    en.wikipedia.org/wiki/HTML_attribute

    In HTML syntax, an attribute is added to a HTML start tag. Several basic attributes types have been recognized, including: (1) required attributes needed by a particular element type for that element type to function correctly; (2) optional attributes used to modify the default functionality of an element type; (3) standard attributes supported ...

  4. HTML - Wikipedia

    en.wikipedia.org/wiki/HTML

    Equivalently, the single-quote character ('), when not used to quote an attribute value, must also be escaped as ' or ' (or as ' in HTML5 or XHTML documents [80] [81]) when it appears within the attribute value itself. If document authors overlook the need to escape such characters, some browsers can be very forgiving and try to ...

  5. Character encodings in HTML - Wikipedia

    en.wikipedia.org/wiki/Character_encodings_in_HTML

    Incorrect HTML entity escaping may also open up security vulnerabilities for injection attacks such as cross-site scripting. If HTML attributes are left unquoted, certain characters, most importantly whitespace, such as space and tab, must be escaped using entities. Other languages related to HTML have their own methods of escaping characters.

  6. List of XML and HTML character entity references - Wikipedia

    en.wikipedia.org/wiki/List_of_XML_and_HTML...

    In SGML, HTML and XML documents, the logical constructs known as character data and attribute values consist of sequences of characters, in which each character can manifest directly (representing itself), or can be represented by a series of characters called a character reference, of which there are two types: a numeric character reference and a character entity reference.

  7. Tag soup - Wikipedia

    en.wikipedia.org/wiki/Tag_soup

    For example, placing a "cite" attribute on a "cite" element is invalid since the HTML and XHTML DTDs do not ascribe any meaning to that attribute on that element. Similarly, including a "p" element within the content of an "em" element is also invalid.

  8. Aspiring CEOs must quickly develop this new set of skills in ...

    www.aol.com/finance/aspiring-ceos-must-quickly...

    Resilience, for instance, has become a critical attribute, not only in a leader's ability to handle setbacks and ambiguity but also in building it into the fabric of the organization.

  9. alt attribute - Wikipedia

    en.wikipedia.org/wiki/Alt_attribute

    The alt attribute is used for short descriptions, with longer descriptions using the longdesc attribute. The standards organization for the World Wide Web, the World Wide Web Consortium (W3C), recommends that every image displayed through HTML have an alt attribute, though the alt attribute does not need to contain text. The lack of proper alt ...