structural :r1 define the structure of the document, eg: < h1 > :r2 describe the content of the page (text, image ...) :r3 determine the appearance of individual elements :r4 do not exist :r1 2 ok :r2 0 :r3 0 :r4 0 -- Header :r1 is given by tag :r2 Contains DTD directive :r3 Contains metadata (encoding, title, author, cascading styles ...) :r4 Contains the tag and includes page text :r1 0 :r2 0 :r3 2 ok :r4 0 -- HTML editor of WISIWYG type :r1 requires the user to know the language of the language :r2 allows the user to fold a page without knowledge of HTML :r3 is a text editor that adds text coloring, tag help :r4 works exclusively with the text format of HTML page :r1 0 :r2 2 ok :r3 0 :r4 0 -- Tags <b>, <i>, <strong> :r1 is used to edit the appearance of the text :r2 are for header formatting :r3 describe the nature of the element content :r4 determine the document structure (define the headings and paragraph) :r1 2 ok :r2 0 :r3 0 :r4 0 -- CSS :r1 is the language for writing a Web page :r2 is the language for programming web applications :r3 is the query language for database systems. :r4 is the language to describe the way elements are displayed on pages written in HTML, XHTML or XML :r1 0 :r2 0 :r4 2 ok -- It is possible to write CSS to the page code :r1 only using the