Briefly describe the relationship between patent specification and patent claim.

The patent specification is a clear and complete introduction to the structure, technical points and application methods of the invention or utility model, which should include the technical field, background technology, invention content, illustrations, specific implementation methods and other items.

The patent claim is an application document that must be submitted to apply for a patent for invention and a patent for utility model. It is the content of a patent for invention or utility model, has direct legal effect, is the core of patent application, and is also an important legal document to determine the scope of patent protection. [