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Up: Unofficial Format of IDL Previous: Pointers and Heap Values

Significant Changes

  1. 2009-09-25 -- Document the NOTICE (19) record type; document STRUCTDESC descriptors which contain classes (and superclasses).
  2. 2009-11-22 -- Document the special format of byte scalars and arrays when stored in variables; reword the data-in-variables section.
  3. 2010-01-11 -- Document how large files are now supported by IDL, changing from NEXTREC to NEXTREC0 and NEXTREC1; better document how PROMOTE64 worked with IDL version 5.4; attempt to document which IDL software versions produced which file format versions.
  4. 2011-12-20 -- Document NBYTES_EL field of ARRAY_DESC (thanks to Yi Qin, Yi.Qin at

Craig Markwardt 2011-12-21