ve two 
ontology files, one has a namespace &lsquo;wine&rsquo; for some URI and another has a 
namespace &lsquo;vin&rsquo; for the same URI, the system must read both in the same 
namespace. However, Lisp cannot read symbols in different packages into some one 
package. To solve this problem, the lisp package nicknames are utilized here. 
When SWCLOS detects the mapping different package names onto a same URI, the 
newly indicated prefix turns out a nickname for the previously mapped package. 
Even so, note