Inserting classification information.

It is important to appreciate that classifying a transformation is not mandatory, but merely assists other applications in making effective use of it. The desirability of classification therefore depends largely on the type of applications which are likely to process the transformation. For instance, a comprehensive general-purpose application, which might be used in conjunction with a wide range of other software, would probably take care to classify a transformation fully, whereas a simpler application, perhaps designed for personal use, might not. However, a declaration of linearity, if it applies, is generally recommended.

When a transformation is first created using TRN_NEW it has no classification information associated with it, so this information has to be inserted explicitly. This is done by calling TRN_PTCL (put classification), as follows: