Saturday 18th of November 2017 04:51:56 PM

CSS Style Guide

 

This Style Guide explains the markup and design requirements for web projects, along with various standards and best practices.

projects authored in valid XHTML 1.0 Transitional and styled with valid Cascading Style Sheets will be described here. See the XHTML and CSS sections below for details. Additional sections of this Style Guide, coming soon, will provide information on writing for the web, naming and filing your documents, and other useful topics and guidelines.

XHTML: Guidelines & Benefits

Library projects must be authored in structural XHTML 1.0 Transitional. Page authors should follow accessibility guidelines in compliance with U.S. Law, and so that our site’s content will be made available to the widest possible number of people, browsers, and Internet devices. In addition, all XHTML must validate.

XHTML Guidelines
The rules of XHTML as compared to HTML—an easy transition
What is XML?
A brief introduction to the foundation of XHTML
XHTML Benefits
Four key benefits of converting from HTML to XHTML
P.clear EM {visibility: visible;}

As for visbility: collapse, this value is used in CSS table rendering, which isn't covered in this book because it wasn't well implemented as the book was being written. According to the CSS2 specification, collapse has the same meaning as hidden if it is used on nontable elements. From a semantic standpoint, this seems somewhat confusing (since collapse sounds like it should trigger the kind of behavior you'd see with display:

XHTML Authoring Tips & Tools
Simplifying the work process—includes tips on thinking structurally, and tools for hand-coders and Dreamweaver users
XHTML Accessibility Tips
Making sure your pages can be read by all visitors, browsers, and devices
XHTML Validation
Ensuring interoperability by avoiding errors and sticking to standards

CSS: Style Sheets & Tips

Library projects must use valid Cascading Style Sheets (CSS) to control typography, color, and other layout elements. Style Sheets must be linked in a way that accommodates the capabilities of new and old browsers.

CSS Guidelines
Tips on authoring and linking to Style Sheets
Steal These Style Sheets!
Style Sheets for your use in Library projects
CSS Validation
Ensuring that your Style Sheets are error-free (same as XHTML validation)

A number of valid Style Sheets have been provided for your use. If you wish to create your own Style Sheets, please discuss your requirements with the Branch Library’s Web Coordinator.

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BLOCKQUOTE {font-style: italic;}BLOCKQUOTE EM, BLOCKQUOTE I {font-style: normal;}
Figure 5-28

Figure 5-28. Common typographical conventions through CSS

5.4.2. Font Variations

Inis the following:

P.roof {border-top: dashed;}

Another thing to note is that since each of these "border-side" properties applies only to a specific side, there isn't any possibility of value replication -- it wouldn't make any sense. There can only be one of each type of value: that is, only one width value, only one color value, and only one border style. So don't try to declare more than one value type: editing strategies, etc.  Here we just summarize image placement on the page with the <IMG> tag:
  Here's an  in-line greyscale image with default settings and unpredicable placement on the page. 

<IMG SRC="ugly2.gif">

If you resize the  browser window the image jumps around as

For example, if you have an address book document stored in an XML file, created on a Mac, that you would like to share with someone who has a PC, you can simply email them the plain text address book XML document. This cant be done with binary encoded information which is totally platform (and program) dependent.

Another example is web enabling legacy systems. It is very feasible to create a Java web ennoblement application server that simply uses the services provided by the underlying legacy system. Instead of rewriting the legacy system, if the system can be made to communicate results and parameters through XML, the new and old system can work together without throwing away a company's investment in the legacy system.

XML is an open standard

By making the W3C the keeper of the XML standard, it ensures that no one vendor should be able to cause interoperability problems to occur between systems that use the open standard. This should be reassuring to most companies making an investment in this technology, by being vendor neutral, this solution proposes to keep even small companies out of reach of big companies choosing to change the standards on them. For example, if a big company chooses to change the platform at its whim, then most other companies relying on that platform suffer. By keeping all data in XML and using XML in communications protocols, companies can maximize the lifetime of their investment in their products and solutions.

the server name, and the path and filename of the file on the server.  Common URL schemes include:
  • http://  = HyperText Transfer Protocol (conventional web pages)
  • ftp://    = File Transfer Protocol
  • gopher://  = Gopher information search