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To enable the flexible solution that has been the goal throughout the design project, the starting point was to design a logical container, which in turn can contain any number of tickets with different contents. The solution has been to design a data structure with a number of data types. The data structure should be able to store strings, numbers, the boolean data type (representing true or false) in unordered and ordered lists. JSON (JavaScript Object Notation) according to RFC 6901 is a text-based compact way to express such data structures, and used very frequently in modern information exchange over the Internet. JSON may also be represented in binary format CBOR (Concise Binary Object Representation) according to RFC 7049, which significantly reduces the size of the data structure and has therefor been selected as the transport encoding of the storage structure.
Vid optisk kodning ska lagringsstrukturen dessutom komprimeras med en icke-förstörande datakompressionsmetod (deflate enligt RFC 1951) för att nå en än högre grad av maskinell läsbarhet och maximalt utnyttjande av tillgänglig lagringskapacitet i den optiska kodningen.
When encoding the data structure for optical encoding, the storage structure shall be compressed using a lossless data compression method (deflate according to RFC 1951) to achieve an even higher degree of machine readability and maximum utilization of the available storage capacity of the optical encoding algorithm.
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