+(defparameter *meta-dir*
+ (make-pathname :directory '(:relative "META")))
+
+(defparameter *lex-dir*
+ (make-pathname :directory '(:relative "LEX")))
+
+(defparameter *net-dir*
+ (make-pathname :directory '(:relative "NET")))
+
+(defparameter *meta-path*
+ (merge-pathnames *meta-dir* *umls-path*))