Label and units of each axis, from the codes and the custom labels.
The raw codes of the header.
The custom X, Y and Z labels, whether or not the file enables them.
Whether at least one axis label comes from the custom labels.
OptionaldateAcquisition date as an ISO string. Local-time layouts have no Z suffix;
undefined when the file has no date or an invalid one.
OptionaldateLayout the date was decoded with, undefined when no date was decoded.
TXYXYS data (e.g. mass spectrum centroids) are drawn as sticks.
Y types from 128 on have inverted (downward) peaks.
The experiment is a chromatogram (TCGRAM with the general experiment code, or a chromatography experiment code).
Memo, decoded and cut at its first NUL.
Readable text left after the first NUL of the memo by the writer.
Modifications applied to the data, in letter order.
Meaning of the DDE posting disposition (fpost).
Processing steps recorded in fprocs, empty when unspecified.
The raw date fields: oyear (with the Z unit code in its high 4 bits),
omonth, oday, ohour and ominute.
OptionalspectraNumber of subfiles, computed from the file size (the old format does not store it). Set by the data block reader.
OptionaltrailingReadable strings found after the last complete subfile, if any.
OptionalxOrder of the X values in the file, set when the data are read.
The custom-label area with its NUL separators removed.
OptionalzpdIndex of the zero path difference point of an interferogram (Y type 1).
Absent when fpeakpt is 0 (unknown) or the file is not an interferogram.
OptionalzSpacing of the Z values of a multifile (set by the data block reader).
Z unit, from the high 4 bits of oyear.
Old-format (LabCalc) file header.