Parse-time word lookup
Top level forms
When the parser reads a word name, it resolves the word at parse-time, looking up the
instance in the right vocabulary and adding it to the parse tree.
Initially, only words from the
vocabulary are available in source files. Since most files will use words in other vocabularies, they will need to make those words available using a set of parsing words.
Syntax to control word lookup
Resolution of ambiguous word names
Word lookup errors