Style sheets allow the author to set up one series of format instructions to be used by potentially all of the pages in the site. Almost all of the pages in the CSS part of this site share a common CSS page thus they will share a common format. The format instructions are stored in a file called "css.css".
The sub-headings below are not correct. However, it is an attempt to simplify a potentially complex environment. Each of the four sub-headings describe a method of enjoining the related style sheet.
Linked stylesheets: look to another file for style information. This file is specifically designed to contribute stylesheet information to another page and uses the "*.css" extension.
Styled stylesheets: contain the <style> tag in the <head> portion of the page,
Cascaded Stylesheets: look to another file for style information. Except that in this case, it can look at multiple files.
Tagged Stylesheets: actually contain style information inside the tag in use in the body of the web page.
ID describes the tertiary identification function
Properties and Values is a list of properties and acceptable values that are specified to be be used in Cascading Style Sheets. Follow the links to a cross reference between selectors and properties and values.