# Network Definition Language

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Not to be confused with [Network Description Language](/source/Network_Description_Language).

**NDL** (**Network Definition Language**) was a compiler on [Burroughs](/source/Burroughs_Corporation) [Large](/source/Burroughs_Large_Systems) and [Medium Systems](/source/Burroughs_Medium_Systems) computers used to create a network definition file for a data communications controller (DCC) and object code for a data communications processor (DCP) that interfaced between a message control program (written in [DCALGOL](/source/Burroughs_large_systems#DCALGOL_and_Message_Control_Systems_(MCS))) such as ([RJE](/source/RJE)), (MCSII) or ([CANDE](/source/CANDE)) and the computer's line adaptors and terminal network.[1][2]

Burroughs Network Definition Language allowed many parameters of the mainframe communications adapter, modems (where used), protocol and attached terminal to be defined. However it treated the low-level operation of the [multi-drop protocol](/source/Polled_I/O), including the modulus of sequence numbers and the algorithm used for [CRCs](/source/Cyclic_redundancy_check) etc. as primitives.

## References

1. Burroughs B6700/B7700 System software handbook (form no 5000722)

1. Burroughs Network Definition Language (form no 7000078)

## External links

- [NDL Language Reference Manual](http://bitsavers.trailing-edge.com/pdf/burroughs/B6500_6700/5000953_B6700_B7700_NDL_Language_Reference_Manual_Jan_75.pdf)

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Adapted from the Wikipedia article [Network Definition Language](https://en.wikipedia.org/wiki/Network_Definition_Language) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Network_Definition_Language?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.