ConversionRules

ConversionRules is an option for Cell which can be set to a list of rules specifying how the contents of the cell are to be converted to external formats.

Typical elements in the list have the form "TeX" -> data.

Settings for ConversionRules do not affect the display of cells in the standard Mathematica notebook front end.

ConversionRules can be used to save the original form of a cell that has been converted from an external format.

See The Mathematica Book: Section 2.10.9.

See also: CellTags.