Sui generis database right
A "sui generis" database right is considered to be a property right, comparable to but distinct from copyright, that exists to recognise the investment that is made in compiling a database, even when this does not involve the "creative" aspect that is reflected by copyright.
Sui generis
For example, in road traffic law, a statute may require consideration of large vehicles separately from other vehicles. The word "large" is ambiguous per se, but may be considered "heavy". Thus the relevant legislation (in Australian law) contains a section called "Terms used" or "Definitions" that itemises all words considered ambiguous, and confers specific interpretations consistent with natural language. So, this list tells us that "heavy vehicle" means a vehicle with a "GVM" over 4.5 tons;" and "GVM" means "gross vehicle mass"—the maximum loaded mass of the vehicle. Further explanations cover various contingencies. Thus "large" is equivalent to "heavy" and is (for this unique case) clearly defined, "sui generis".