• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

3. Anatomy of an HTML Document > Well-Formed Documents and XHTML

Well-Formed Documents and XHTML

XHTML is HTML’s prissy cousin. What would pass most beauty contests as a very proper and complete HTML document, done according to the book and including end-paragraph tags, might well be rejected by the XML judges as a malformed file.

To conform with XML, XHTML insists that documents be “well formed.” Among other things, that means that every tag must have an ending tag — even the ones like <br> and <hr> for which the HTML standard forbids the use of an end tag. With XHTML, the ending is placed inside the start tag: <br />, for example. [Section 16.3.3]

It also means that tag and attribute names are case-sensitive and, according to the current XHTML standard, must be in lowercase. Hence, only <head> is acceptable, and it is not the same as <HEAD> or <HeAd>, as it is with the HTML standard. [Section 16.3.4]


PREVIEW

                                                                          

Not a subscriber?

Start A Free Trial


  
  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint