* Locking
* Think about our linterp look-up optimisation
* Hashed compressed files

Proposed additions to the Standards:
* POLYCOM field type (from MDT & JK for BLAST & ACT)
  <field-name> POLYCOM <field> <a0> <a1> [<a2> [<a3> [<a4>]]]
  field-name = a4*field^4 + a3*field^3 + a2*field^2 + a1*field +a0
