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Is Xhtml Element Name Case Sensitive?

Answer»

Yes, XHTML ELEMENT names are case SENSITIVE. All element names must be written in lower case letters. Here are some valid and invalid XHTML element names:

  • Valid name.
  • Invalid name, must use lower case letters.
  • Invalid name, not defined by XHTML specification.
  • Invalid name, must use lower case letters.

NOTE to HTML document authors: HTML element names are not case sensitive. But XHTML element names are case sensitive. If you are CONVERTING existing HTML documents to XHTML documents, you will get a lots of syntax errors about upper case letters used in HTML tags.

Yes, XHTML element names are case sensitive. All element names must be written in lower case letters. Here are some valid and invalid XHTML element names:

Note to HTML document authors: HTML element names are not case sensitive. But XHTML element names are case sensitive. If you are converting existing HTML documents to XHTML documents, you will get a lots of syntax errors about upper case letters used in HTML tags.


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