{"field":"Package","optional":"Mandatory","description":"Name of the package"}
{"field":"Version","optional":"Mandatory","description":"Version number (a.b-c)"}
{"field":"License","optional":"Mandatory","description":"License"}
{"field":"Description","optional":"Mandatory","description":"Comprehensive description of the package"}
{"field":"Title","optional":"Mandatory","description":"Short (1 line) title"}
{"field":"Author","optional":"Mandatory","description":"Author(s) of the package"}
{"field":"Maintainer","optional":"Mandatory","description":"Maintainer (John Doe <john@doe.com>) "}
{"field":"Date","optional":"Optional","description":"Date (yyyy-mm-dd)"}
{"field":"Depends","optional":"Optional","description":"Dependencies of this package"}
{"field":"URL","optional":"Optional","description":"Homepage"}
{"field":"SystemRequirements","optional":"Optional","description":"System Requirements"}
{"field":"Imports","optional":"Optional","description":"Packages that are imported"}
{"field":"Collate","optional":"Optional","description":"Order of files"}
{"field":"LazyLoad","optional":"Optional","description":"Use the lazy loading mechanism"}
{"field":"LazyData","optional":"Optional","description":"Use the lazy loading of data"}
{"field":"ZipData","optional":"Optional","description":"zip the data "}
{"field":"Encoding","optional":"Optional","description":"encoding of this file"}
{"field":"Type","optional":"Optional","description":"type of the package (Package|Frontend|Translation)"}
{"field":"LinkingTo","optional":"Optional","description":"the C code of this package links to ..."}
{"field":"Suggests","optional":"Optional","description":"Suggested (optional) dependencies"}
{"field":"Enhances","optional":"Optional","description":"Package(s) enhanced by this one"}
{"field":"Language","optional":"Optional","description":"Language used in this package"}
{"field":"OS_type","optional":"Optional","description":"Type of OS (unix|windows)"}
{"field":"BugReports","optional":"Optional","description":"Where to report bugs?"}
{"field":"Classification/ACM","optional":"Optional","description":"Classification according to the Association of Computing Machinery"}
{"field":"Classification/JEL","optional":"Optional","description":"Classification according to the Journal of Economic Litterature"}
{"field":"Classification/MSC","optional":"Optional","description":"Classification according to the American Mathematical Society"}