Program Development Facility
Like JSP Tool, the Program Development Facility (or PDF as it is more widely known) a DOS-based tool produced by Michael Jackson Systems Limited which used for editing Jackson Structure diagrams and generating source code from them.
PDF structures are saved as text files. Unliked JSP Tool, a PDF file only contains a single structure and allows a structure header, but not a structure footer.
Example PDF syntax
0 1-FEB-06 PDF V2.1C BOOK 1, 7, 7, 1 0 BOOK SEQ NORM 0 ACQUIRE LEAF NORM 1 CLASSIFY LEAF NORM 1 life SEQ NORM 0 loan SEQ NORM 0 LEND LEAF NORM 1 renews ITER NORM 0 RENEW LEAF NORM 2 RETURN LEAF NORM 3 end part SEL NORM 0 SELL LEAF NORM 1 DISPOSE LEAF NORM -1 BOOK SEQ NORM
PDF was sold in the late 1970's and early 1980's by Michael Jackson Systems Limited. It is no longer available to buy or supported.
The Structure Editor component of the KCSL Jackson Workbench provides a complete replacement for PDF. It can read and write structure diagrams in PDF format. Full support options are available for this product.