A critical or explanatory commentary or analysis.
Information relating to the genetic structure of sequences of bases.
Metadata added to a document or program.
A comment added to a text.
The process of writing such comment or commentary.
A premise from which conclusions are drawn.
A floating reference point, or SLDMB, used to evaluate surface currents in a body of water. Often employed by coastal search and rescue.
A fixed reference point or set of reference points which precisely define a system of measurement or a coordinate system.
A fact known from direct observation.
To provide missing data points by using a mathematical model to extrapolate values that are outside the range of a measuring device.