XHTML TermsAbsolute URLA URL that specifies the entire path to a resource, including the scheme, server name, path, and the file name itself. Forexample http://www.google.com is an absolute URL.AnchorJump points within an XHTML page that can be used as destinations for links.AttributePart of an element that defines a property of that element. For example, in the markup <a href="index.html">Home</a>,href is an attribute of the a element.Block-levelMarkup elements that display their content on a new line; used mainly for structural parts of a Web page, such as headings.For example, p, ul, and h1 are block-level elements.BodySection of XHTML markup that contains the content of the Web page.CascadeMethod used in cascading style sheets that takes into account inheritance, specificity, and locality when more than one rulecan be applied to format page elements.Cascading Style Sheet (CSS)Style sheet language used to describe the presentation of a document written in a markup language. Cascading style sheetsare made up of one or more rules.Cell PaddingNumber of pixels between the table cell’s content and the table cell’s border. See also: cell spacing.Cell SpacingNumber of pixels between the borders of each table cell. See also: cell padding.CheckboxForm widget – specifically a selection widget – that allows the user to make multiple selections from a number of items.ChildElement that is nested within other elements. For example, in the markup <h1><i>Introduction</i></h1>, i is the childelement.Client-side Image MapImage map defined within the XHTML markup and that is interpreted by the browser (i.e., the client).DeclarationComponent of a cascading style sheet rule that specifies the formatting to be applied. For example, in the rulep { color: red; }, “color: red” is the declaration.Definition ListSpecial type of list used for glossaries or other word-phrase pairs. See also: ordered list and unordered list.DestinationThe part of a link that specifies the type of resource. Destinations can include images, sound files, movies, or other Webpages.Division (div element)Breaks text into blocks that can be formatted using cascading style sheets.ElementMarkup component that specifies document structure; can contain text, other elements, or nothing at all. For example, p,table, i, and form are elements for paragraphs, tables, italicized text, and input forms respectively.FormMechanism that allows the user to provide input via selection widgets and text input widgets. See also: get method, postmethod, hidden field, submit button, and legend.Frameset XHTMLVersion of XHTML that allows frames; this version will be phased out eventually. See also: strict XHTML and transitionalXHTML.get MethodForm submission method that encodes the form data (i.e., name/value pairs) into the URL. Suppose a form has two inputelements with the names name1 and name2 with respective values value1 and value2. The get method would send a URLof the form script.url?name1=value1&name2=value2. If the form values contain non-ASCII characters or the formcontent of the URL exceeds 100 characters, the post method must be used.HeadSection of XHTML markup that defines the title of the page and other information that isn’t usually visible to the viewer ofthe page, but is useful to search engines.Hidden FieldForm component that allows name/value pairs to be specified without any visual representation.Image MapAn image divided into clickable regions; the two types of image maps are client-side image maps and server-side imagemaps.InheritanceSituation pertaining to cascading style sheets in which a child element takes on the properties of its parent element withrespect to formatting.InlineMarkup elements that display their content on the current line; used mainly for text. For example, b, sup, and span areinline elements.LabelThe part of a link that the user sees and clicks on to reach the destination.LegendMechanism for visually grouping form widgets by placing a labeled border around them.LinkReferences to resources on a file system. Links have three components: destination, label, and target.LocationSituation pertaining to cascading style sheets in which ties between inheritance and specificity are resolved. For example,locally-defined rules specified within the element itself via the style attribute have higher precedence.MarkupInformation about the document content that is included in the document itself. Markup can include formatting instructionsor details about relationships between parts of the document. Because the markup is text, the document is universallyreadable. XHTML has three main types of markup: elements, attributes, and values.MenuForm widget – specifically a selection widget – that allows the user to select one (or possibly multiple) of severalpredefined values. Menus are useful in situations where there is not enough screen “real estate” to display all the values orwhere the readability of the page would be impaired by displaying too many values.Ordered ListA collection of items that are numbered. See also: definition list and unordered list.ParentAn element that contains other elements. For example, in the markup <h1><i>Introduction</i></h1>, h1 is the parentelement.Password BoxForm widget – specifically a text input widget – that can be used to visually mask confidential data, such as passwords,from casual observers.post MethodForm submission method that does not include form data (i.e., name/value pairs) as part of the URL. The post method isconsidered more secure because the get method allows a hacker to bypass the form by calling the server-side script directlyand passing arbitrarily-encoded URL string, which could contain invalid names and values. If the form values contain non-ASCII characters or the form content of the URL exceeds 100 characters, the post method must be used.Properly nestedCharacteristic of elements where children elements are terminated before parent elements. For example, the markup<h1><i>Introduction</i></h1> is properly nested because the child element (i) is terminated before the parent element(h1). However, the markup <b><a href="index.html">Home</b></a> is improperly nested because the b element wasterminated before the a element.Radio ButtonForm widget – specifically a selection widget – that allows the user to choose only one of a predefined set of items. Whenthe user selects a radio button, any previously selected radio button in the same group is