Creative Commons licenses provide a flexible range of protections and freedoms for authors, artists, and educators.
The website claims XHTML Transitional status. XHTML 1.0 Transitional is the same as HTML 4.01 Transitional, but follows XML syntax rules. It supports everything found in XHTML 1.0 Strict, but also permits the use of a number of elements and attributes that are judged presentational, in order to ease the transition from HTML 3.2 and earlier. These include center, u, strike, and applet.
RDF Schema provides a data-modelling vocabulary for RDF data.
Meta tag containing keywords related to the page.
The description attribute provides a concise explanation of the page content.
Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in a markup language. Its most common application is to style web pages written in HTML
JavaScript is a scripting language most often used for client-side web development.
A persistent uniform resource locator (PURL) is a URL which describes an intermediate location which, when retrieved, results in redirection to the current location of the final resource. The site contains schema information identifying the use of PURL.