Accessing multivalued attributes

Hello,

can anyone tell me the right way to process multivalued attributes? I have a
DTD which specifies an attribute as type NMTOKENS. In the dom-tree I get
only a single string containing the NMTOKENS separated by spaces. Do I have
to parse this string by myself if I want to access the single NMTOKENS?

Thank you for your attention,

Stefan Wachter
SWachter@heyde.de