Naming conventions for nodes and fields
The following naming conventions apply to nodes and fields in the source and target structure.
Allowed characters
Allowed characters are "a-Z" and "0-9" and the special characters "_", "-" and "#".
Non-permitted 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 target structure. However, a name used in the source structure can be used in the target 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 Match codes, unique names, reserved names (XML).