Do NX have memory Slots to store and retrive user datas through Api's like CREO
If I undersand your question correctly...
You want to store user data inside the part file?
For "really simple" data you can use Attributes and/or Expressions
For more complex cases, look at UDOs (user defined objects)
Production: NX10.0.3.5 MP5 + patch/TC11.2I'd rather be e-steemed than e-diseaseled