Import data from external file

In order to read data from an input file rather than from the database, a file input can be defined.

The from file clause requires an operand list after the FROM FILE keyword. The requirements for the operand list are more specific in this case.

Input files may refer to different file formats as OIF, XML and ESDF (CSV). All file formats support attributes, complex attributes and references.

In order to call the file input function from within an operation path, the fromFile keyword should be used, instead.