XHTML, eXtensible HyperText Markup Language, is an application of HTML that is also a valid XML document, as opposed to standard HTML which is based on SGML. It is a markup language commonly used for webpages.

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What is the correct DTD for Schema DATA placement in XHTML pages?

We get W3C validation error after placing Scheme Data in our website which was built in XHTML. Line 198, Column 41: there is no attribute "data-id" <script type="IN/FollowCompany" ...
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1answer
45 views

Are there any problems with pages from the same site using different doctypes?

After a re-design of some pages in our site, we have the new re-designed pages with doctype HTML5 and all the rest pages (that are not yet redesigned) with doctype XHTML 1.0 Transitional. Does that ...
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1answer
58 views

When updating to HTML5, will adding <!doctype html>, <article>, and microdata result in rendering problems in older browsers?

When updating our website from XHTML to HTML5, will changing the following things result in rendering problems for our site in older browsers like Internet Explorer 8: Specify <!doctype html>. ...
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2answers
91 views

Is it bad to have a mix of HTML 5 and XHTML pages within one website from SEO perspective?

We are going to update our website from well-formed XHTML 1.0 Transitional to HTML 5. However, as I see, we will be doing this step-by-step. This means we will have some pages in HTML 5 and others in ...
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1answer
79 views

Can changing websites from XHTML 1.0 to HTML5 affect rendering in older browsers like Internet Explorer 8?

We are considering the pros and cons of switching from XHTML 1.0 Transitional to HTML5 for our website (for instance, to enhance our SERP positions by using microdata and new specific HTML5 tags for ...
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1answer
90 views

Upgrading website from XHTML 1.0 Transitional to HTML 5: how can it affect SERP positions?

We have an enough old but still supported website which is XHTML 1.0 Transitional now. We are going to change it to HTML 5 to add some new features in the future (microdata, ...
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99 views

Why is my DOCTYPE showing up as red italic in Page Source?

When viewing my page in Page Source, I am getting the first line in red italic. What is causing this and is it an issue?
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2answers
323 views

How to achieve SEO for XHTML pages which load data in DOM using a JQuery-AJAX service calls?

I have a simple website (5-8 XHTML pages and a payment gateway to be done) with about 1500 products having a fix SKU/product code. sample URL for the query: ...
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2answers
103 views

Web page has well over 100 anchor tags - how to improve SEO without taking anchors out?

I have a website where the main menu has 10 level 1 items and each has roughly 10 level 2 items plus there are links in the header and footer and side bar plus some links in the content. All these ...
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2answers
31 views

will my continuing to use EW4 become a handicap someday later? [closed]

I am using Expression Web 4 SP 2 for building my web site but Microsoft says they won't do any further development. I keep hearing about HTML5 and XHTML, etc. and sure sure if my continuing to use ...
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1answer
47 views

Setting The Right Website MIME Type?

I have been testing my project using the W3C Validation tool and it passes 100% with no errors and just 1 warning - XHTML 1.0 Transitional. Warning - Conflict between Mime Type and Document Type ...
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2answers
245 views

As a beginner, I would like to know which should be the markup language to startup with [closed]

I am a beginner in Web Designing. For sure a CMS like Joomla (Joomla 3.1, now) is very useful for one who doesn't care about coding. But... I know for sure that the ability of coding really helps a ...
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0answers
58 views

Should I link the main article heading? [duplicate]

Possible Duplicate: Anchor tag inside H1 or H1 inside achor tag : Which is better? Why, on StackExchange sites, is the post title on the question page a link to itself? Assuming, that I ...
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2answers
276 views

Serve up syntactic XHTML5 using the text/html MIME type?

I have a site currently written with HTML5 tags. I'd like to be able to parse the site as XML, with support for namespaces, etc, to facilitate programmatic extraction of data. Currently I have ...
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1answer
41 views

When I'm delivering a page with the XHTML mime type, should I use XML DOM or HTML DOM?

I prefer using the XHTML mime type for pages, instead of HTML, and serve a different mime type to IE, but when I do this, should I use XML DOM or HTML DOM?
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1answer
56 views

Removing URL styles with CSS + SEO

I want to display a grid of images 4x4 with thumbnails and a title above each of them. I want to highlight the thumbnail and title and add a hyperlink to it. This works well in our CMS. I would like ...
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1answer
203 views

How do I serve XHTML to Internet Explorer without breaking Chrome?

I run a forum which serves its pages as XHTML+MathML+SVG; in full: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" ...
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0answers
303 views

Embedding *.swf objects: javascript vs xhtml [closed]

I am a newbie in webdesign and I´ve been wondering which is the modern way to embed swf objects. I've been using the following html code: <object id="flash1" data="presentacion/prototipe.swf" ...
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3answers
122 views

Do search engines care about case sensitivity?

Which is better for SEO ? HTML <p id="hello"></p> <p id="HELLO"></p> <p id="Hello"></p> <p id="hELLO"></p> JAVASCRIPT function hello(){} ...
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5answers
206 views

HTML vs Xhtml; which one to start with

hey people i am starting to learn making websites, now i want to know what is the difference b/w HTML and XHTML; kindly keep it simple and jargon free pls. :) also, what mark up language i shall use ...
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3answers
57 views

What would be the correct html element for document author?

Which html element should be used when writing out the author of an html document, with regards to semantics, SEO and so forth? Thanx!
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3answers
226 views

Is my Document Type Definition Still Up to Date?

currently all my php generated rich html webpages start with this line, which I have been adding to my tempaltes YEARS ago... <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" ...
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148 views

Other link relationships and impact to the SEO

Example other link relationships <head> <link rel='index' title='Main Title' href='http://domain.com/' /> <link rel='start' title='Part Three' href='http://domain.com/part-3/' /> ...
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2answers
284 views

Can/should I nest the html abbr tag within a link?

I link to my CV with the following: <li><a href="http://example.com/cv">CV</a></li> However, should I have/would you recommend I have: <li><a ...
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6answers
255 views

Is it important to have semantically correct HTML with regards to SEO?

SEO seems to be a subject surrounded by both myths and varying opinions. Nevertheless, I would like to know if you have an opinion on how important it is to have semantically correct XHTML, that is, ...
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2answers
91 views

Do you have stats/trends for use of different HyperText Markup Languages?

For example: html-XYZ, xhtml, html5
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1answer
3k views

Why does Open Graph use <meta property=… in their example code?

As far as I can tell, property is not a valid attribute of the <meta> tag in any of HTML 3, 4, XHTML-Transitional or XHTML-Strict. So why does the Open Graph Protocol (and Facebook's API docs) ...
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7answers
984 views

HTML and “quirks” vs. “standards compliance” modes: Explain, and tell us why we should care?

What is the difference between "quirks" mode and "standards compliance" mode, when building HTML web pages? How to tell when operating in one mode, vs. the other? Why should people – i.e. ...
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11answers
2k views

Common optimizations to reduce HTML or XHTML page size?

What are some common optimizations performed to reduce HTML or XHTML page size? Some that come to mind are: removing comments, removing extraneous whitespace, moving repetitive inline styles to a ...
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2answers
81 views

Strict doctypes

I was wondering about the consequences of building a site thats complaint with XHTML1.0 Strict. I have developed a lot of sites using the transitional doctype, and read about the consequences of a ...
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2answers
184 views

What are the basic things to do in order to make a web site iPhone-friendly or more mobile-accessible?

What are the basic things to do in order to make a web site iPhone-friendly or more mobile-accessible in general?
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10answers
1k views

What is new in HTML5/CSS3?

I've seen this site and this site, but that's a lot to digest. What are the main things about HTML5 that make it different/better than regular old (X)HTML/CSS?
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8answers
3k views

Should I use HTML5 and/or CSS3 to build my website?

The new HTML5/CSS3 (Web8!) stuff sounds cool! Should I start using it now or stick with css/xhtml wait until more browsers can use it?