Most attributes are done this way. A DTD is the file your browser reads with the names and attributes of all of the possible tags that you can use in your markup defined in it. Then lets get to the interesting part: Attribute-value pairs must be written in full. Hopefully, you now have an understanding of elements, start tags, end tags, the basic structure of an XHTML document, and the text elements we looked at in the previous section.
So far so good? The rules that teach a boy to be a man. Start Tags A start tag is made up of a left angle bracket, followed by the name of the element, and a right angle bracket. This page was last updated on Why the Change?
Case Sensitivity When you enter your tags, you must make sure that the names use lower case letters only. It is, by far, the most-used language on the Web. Every tag must be closed. Right, before we get into all this, you should have a good grasp of the ancient and more recent past of HTML.
For example, the following text has a section of each type of text: Once you have used XHTML for a short time, it is no more difficult to use than HTML ever was, and in ways is easier since it is built on a more simplified set of standards.
A good HTML editing tool will allow you to set a preference for lower case tags. In HTML you could leave tags unclosed and it would display just fine.
The first disadvantage of not closing void tags is that users have to have knowledge of the existing void tags. It is instantly compatible with XML. It is used for longer quotes: Start tags consist of the following parts, in exactly the following order: Instead of inserting an end tag immediately after the start tag has finished, all we have to do is put a slash before the right angle bracket of the start tag to tell the computer that this element is finished.
This is because XML is case-sensitive — i. By placing the HTML 4. Neither can your elements. I have your answers: Empty Elements Certain elements do not have any content. For a while you should probably include both so that your links still work on older browsers, but this will be the method used in future.
Now the tags must follow a logical begin and end pattern. It has a mandatory alt attribute, and for good reason: One thing means one thing. All tags must be lower case.
First of all, they ensure excellent forward-compatibility for your creations. Just remember that they exist. XHTML tags need to be written in lower case. XML is very specific.Using the br Tag - Line Break Tag The line break tag is the br> tag in HTML and br /> in XHTML.
A br tag will insert a line break which means the text/image following the tag will be moved to the next line when displayed in the browser.
XHTML is HTML written as XML. Today's market consists of different browser technologies. Some browsers run on computers, and some browsers run on mobile phones or other small devices.
Smaller devices often lack the resources or power to interpret "bad" markup. XML is a markup language where. The following syntax shows the correct way of writing above tags in XHTML. Difference is that, here we have closed both the tags properly.
This is valid in XHTML --> This paragraph is not written according to XHTML syntax. Differences Between HTML and XHTML. In HTML, the br> tag has no end tag. In XHTML, the br> tag must be properly closed, like this: br />.
Whenever you start to write a XHTML document, first step is to defines document type on the top of the document. Use the transitional DOCTYPE when you want to write document in proper rules. XHTML every tag attributes must be write. A summary of the main elements of XHTML.
A cookbook to help convert HTML documents to XHTML.Download