1.xml tags are case sensitive
2.the declaration tag is not an xml element
and it doesnt have a close tag
3.all xml elements must have a close tag..
4,xml attributes' values must be quoted
In Windows applications, a new line is normally stored as a pair of characters: carriage return (CR) and line feed (LF). The character pair bears some resemblance to the typewriter actions of setting a new line. In Unix applications, a new line is normally stored as a LF character. Macintosh applications use only a CR character to store a new line.
With XML, a new line is always stored as LF.
With XML, CR / LF is Converted to LF
XML Elements Must be Properly Nested
XML Documents Must Have a Root Element
With XML, White Space is Preserved