The authors are using their own Spell[1] tool to parse syslog files into patterns that represent the fixed part of printf-like log statement. Is the source of t

The authors are using their own Spell[1] tool to parse syslog files into patterns that represent the fixed part of printf-like log statement. Is the source of that available? At the heart of this is a tree-based construction that is not well explained. [1] https://www.cs.utah.edu/~lifeifei/papers/spell.pdf https://www.cs.utah.edu/~lifeifei/papers/spell.pdf