Experimental Feature - User-Defined Function Feature

[mbeckerle]

[mbeckerle]

Needs a document for consideration as a feature.

This is in use but not much. The concept was proven with a UDF that converts mean-sea-level elevations to height-above-ellipsoid (HAE) elevations in a military data format.

[mbeckerle]

Daffodil has a UDF feature and documented API here:
https://daffodil.apache.org/docs/latest/javadoc/org/apache/daffodil/api/udf/package-summary.html

This is Java specific. Other than package names it's pretty generic and could be used in other implementations on JVM, and adapted for C/C++ implementations. There are always going to be some implementation-specific details for such a feature.