The XML declaration is a processing instruction that identifies the document as being XML. All XML documents should begin with an XML declaration.
Comments are used to hide text from the end user when the output document is displayed. They are useful as notes to the author of the document, or other authors who may modify the document.
Processing instructions are used to embed information intended for proprietary applications. The XML declaration is an example of a processing instruction. Processing instructions beginning with 'xml' or 'XML' have been reserved for standardization in the XML Version 1.0 specification and onwards.
DopaCMS (Domain Parking CMS)