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Lexical Elements

Keywords

These are what are called reserved words, which means you can't use these as your variable names (you can use the letter "p" but you can't use p on its own as the name for something because that's how TatML knows you're referring to a picot. 

pattern, thread, shuttles, repeat, if, reverse_work, join_to_start
R, C, SR, MR, p, sp, lp, jp, join, prev, current, not_last, import, use

Identifiers

  • Pattern names: quoted strings "Simple Flower"
  • Element IDs: alphanumeric + underscore, starting with letter ring1, center_motif
  • Picot names: alphanumeric + underscore join_here, small

Literals

Literals are values that you set when writing a computer program or, in this case, a tatting pattern. 

  • Numbers: positive integers 1, 5, 12
  • Strings: double-quoted "Pattern Name"
  • File paths: quoted strings "./motifs/some_pattern.tatml"

Operators and Delimeters

Operators are characters or indicators that your code is changing something (like a plus or minus sign when you do math), and delimeters are used to separate or organize parts of the TatML code that represents your pattern or motifs within one. 

: ( ) { } [ ] , ; . //  /* */

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