Naming Conventions for Nodes and Fields
The following naming conventions apply to nodes and fields in the source and destination structure.
Allowed Characters
Allowed characters are a-Z and 0-9 and the special characters _ - #.
Not Allowed Characters
Spaces and all other special characters are not allowed.
Names in the source structure must not begin with numbers.
Uniqueness of Names
All names within the source structure must be unique. The same applies to the destination structure. However, a name used in the source structure can be used in the destination structure, but this should be avoided in practice to prevent confusion.
If it is nevertheless necessary to use the same names (e.g. when handling XML files), special suffixes can be used, see section Representation of XML Attributes in Source and Destination Structure.