Core Attributes

XHTML (eXtensible HyperText Markup Language) "CORE" STANDARD ATTRIBUTES These can modify or identify tags used in the body element. But there are other tag-specific attributes, too. class="?" The value will be a name pre-defined in a style sheet. id="?" This allows you to "target" the identified element to create internal links, and to program stuff which will apply only to the identified element. The number sign (#) references the id: id="foo" is referenced as: #foo. The value of each tag identifier must be unique, i.e., an id attribute may not be repeated in any other tag. And it can't start with a digit or a hyphen.  Although id replaces the deprecated name attribute, the W3C recommends using (at least for now) identical id and name attributes for "maximum forward and backward compatibility" with browsers:  EXAMPLE:  <h3 id="foo" name="foo">A Heading Called "foo"</h3> style="?" Use to modify style features inline, i.e., at the point where the change takes effect. The value ("?"), or style "declaration," takes the form: property: value Multiple properties are separated by semicolons.  EXAMPLE: <p style="text-indent: 5%; color: orange; font: bold smaller verdana">This paragraph is indented 5% of its width, and the orange, bold-faced text is in a font named "helvetica." It's smaller, too. These features last until the paragraph is closed, unless changed by another <span style="color: black; font: italic large serif">style attribute</span> along the way.</p> displays as: This paragraph is indented 5% of its width, and the orange, bold-faced text is in a font named "helvetica." It's smaller, too. These features last until the paragraph is closed, unless changed by another style attribute along the way. [Note: There is an optional style tag (as opposed to this style attribute) in the head element that pre-defines display features. External style sheets provide another (better) way to pre-define stylistic features, too.] title="?" Use this to create pop-up text boxes, or "tool tips."