[329395] Possible BEA Object Types

Possible BEA Object Types
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BLine - an input line
BTokenization - a tokenized input line
  ofLine: BLine - which line we have tokenized
  tokenizer: BTokenizer

BSequence - a sequence of lines
  entries: L<BLine>

BPurpose - basically a type of transformation
  (simplification, specialization, generalization, answer etc.)

BDerivation
  from: BLine
  to: BLine
  purpose: BPurpose
  performedBy: L<BFunction>