XML Naming Rules

Posted on 18th February 2014

There are certain rules that must be followed when naming XML elements, attributes, entities etc..

XML names can contain any alphanumeric character (a-z, A-Z, and 0-9)
XML names can contain accented characters and characters from non-Latin script languages
XML names can contain punctuation characters - (hyphen), _(underscore) and . (period)
XML names cannot start with the word xml (in upper case or lower case or any combination)
XML names cannot start with numbers, -(hyphen) or . (period)
XML names cannot contain white spaces

XML is case-sensitive so the elements <Catalog>, <CATALOG> and <catalog> are all treated as different

The following are some valid XML names :
<Movie_Catalog>
<movie-100>
<movie.catalog>

The following names are invalid:
<xml-Catalog> cannot start with the word xml
<movie=catalog> cannot contain =
<movie catalog> white space is not allowed
<100movie> cannot start with numbers

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