This final section looks at the process of validating and checking our HTML and CSS code.Browsers which support style sheets are very choosey about HTML.REST architecture treats every content as a resource.These resources can be Text Files, Html Pages, Images, Videos or Dynamic Business Data.
This version of HTML has three flavors, strict, transitional (or loose) and frameset.
It is the responsibility of the REST server to pass the client the resource in the format that the client understands.
Following are some important points to be considered while designing a representation format of a resource in RESTful Web Services.
You can check either a page already online, or upload a page for checking.
Both of these return a list of problems with the page which itemize difficulties line by line.