You concatenate TCFs together to form time capsules. We only assume that file systems of the future will be capable of storing sequences of 8-bit bytes. We are also biased towards English. Each TCF is made up of a sequence of fields. Each field contains a name and an associated value.
Some fields specify some attribute of the enclosed file.
Other fields specify attributes of the TCF itself. Comparison of field names, and other tokens called for in this document, is case insensitive. Note that an effort has been made to keep TCFs readable text files. If someone without a clue about TCF format reads a TCF into a text editor, she should stand a pretty good chance of recovering the original data by just reading the text and guessing what everything means. There are two forms in which a field can be written.