XHTML Verification
for Web Site
You design and develop a web site but how would
you know if you have put all
the HTML syntax in correct
way. Almost all browser don't complain against your wrong syntax but wrong
is wrong. There are many SEO experts who claim that SEO is not dependent on
site HTML/XHTML verification. But I will tell you various reasons why your site
should be W3C Compliance.
Why HTML/XHTML
Verification is Required?
There are various reasons to verify your web page
before hosting it over the internet.
·
Any web page
quality depends on how well you have written your web page. It should be
syntactically correct and should pass all the Quality Gates.
·
When any
Search Engine does indexing for your web page content it might get confused if
your HTML tags are not written properly and much of the web page content might
not be indexed properly.
·
There might be
many HTML tags which you are using in your web page but then have been
depreciated and many of the search engines also don't support them.
·
Consistency,
HTML Code Beauty, Process Compliance are always appreciated by good Webmasters.
What Is
W3C Compliance?
The W3C is the World Wide
Web Consortium and since 1994 the W3C has provided the guidelines by which
websites and web pages should be structured and created. Here are the links to
validate your web pages:
·
Validate HTML/XHTML File against W3C Standard HTML/XHTML Validator.
·
Validate CSS
File against W3C Standard CSS Validator.
While doing verification you will get errors
along with appropriate reasons. All the validations will be done using XHTML
DTD which is a refined version of HTML.
Rules for
W3C Compliance:
There are following rules which you should keep
in your mind while writing your web pages.
·
Use the XHTML declaration statements to start
every XHTML page:
<!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Strict//EN"
"DTD/xhtml1-strict.dtd">
·
Every tag must be closed.
·
The head and
body tags are now mandatory.
·
Empty tags get
a terminating slash. An empty tag is a tag that doesn't require an end tag.
Examples include <br> and <hr>.
<BR> is now <br />. <HR> is now <hr />.
<IMG SRC="--"> is now <img src="--"
/>
·
All tags must
be lower case. This does not apply to attributes, only tags. For example, both
of these formats are acceptable under the XHTML DTD:
<FONT
color="#ffffcc"> is invalid <font color="#ffffcc">
is valid <font color="#FFFFCC"> is also valid
·
All the attribute values should be put with-in
double quote.
·
Tags may not
nested
<b><i>Text</b></i> This is invalid
<b><i>Text</i></b> This is valid
·
The <pre> tag should not contain: img, object,
big, small, sub, or sup.
·
One
<form> tag can not be inside another <form> tag.
·
If your code
contains a &, it must be written as &.
·
Any use of CSS
should use all lower case lettering.
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