Connection table formats GEMINI

There are only three fundamental ways in which connection table formats differ what information is stored, how that information is represented, and how those representations are encoded. GEMINI achieves a high degree of generality by dividing its task into these three parts. 

Estabhsh a set of information types which is adequate to describe the information contained in the desired connection table formats. Select a single data representation and encoding for each type of information this will become GEMINI S internal encoding. 

John Barnard s poster on the Standard Molecular Data (SMD) File is mainly of historic interest because SMD has since progressed fast under his leadership as Technical Secretary. The Weiningers poster also involved a connection table format. The chapter describes Daylight Chemical Information Systems GEMINI language and interpreter. 

The section of a GEMINI specification which specifies the actual connection table information must be delimited by begin—ct and end ct. This dehmits the repetitive structure specification block in formats which allow multiple connection tables in one file. 

The GEMINI approach to connection table interpretation provides a useful front-end for programs which process chemical information. CTF descriptions are compact enough that they can be included along with conection tables when transmitting data between sites with incompatible formats. 

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