NDL for the GLIF - NDL Generator

NDL - Network Description Language - is an ontology for description of (hybrid) networks, aimed at facilitating the inter and intra domain lightpath provisioning. The GLIF collaboration makes use of NDL to describe each individual domain, allowing for example the generation of global GLIF network maps.

This page will guide you through the generation of a NDL file that describe your network.

The resulting RDF file is based on the latest NDL Topology Schema. You can view this schema here


Step 1 - Location

Indicate the identifier and the human readable name of the network that is going to be described in NDL.
Provide also the latitude and the longitude of this location. Both latitude and longitude should use floating point notation.

Identifier (Human-readable) Name Latitude Longitude

Step 2 - Devices

Indicate the name of the devices present in the network. If you need to describe more devices just press "Add a Device"

DeviceDevice's location id
DeviceDevice's location id
DeviceDevice's location id

Step 3 - Interfaces

Click on the button "Generate interfaces for devices" to create the table of the interfaces for the above devices.
For each interface, please give the name of the interface, where it is connected to and (if possible) the capacity for each of the interfaces on a device.

The capacity should be given in bytes/second, using floating point notation. See the reference table at the bottom of this page for example values.

An interface can be indirectly connectedTo to another interface. This is the case when you do not have knowledge of the intermediate devices, but you know what is the end point of the connection
An interface can also be directly linkedTo to another interface.
In both cases you indicate the URI (the name) of the remote interface:

To reset the interface part of the field click the button below.


Step 4 - Generate NDL

Reference list of bandwidth values

DS0(0.064Mbps)8.000E+03
DS1(1.544Mbps)1.930E+05
E1(2.048Mbps)2.560E+05
DS2(6.312Mbps)7.890E+05
E2(8.448Mbps)1.056E+06
Ethernet(10.00Mbps)1.250E+06
E3(34.368Mbps)4.296E+06
DS3(44.736Mbps)5.592E+06
STS-1(51.84Mbps)6.480E+06
Fast_Ethernet(100.00Mbps)1.250E+07
E4(139.264Mbps)1.741E+07
OC-3/STM-1(155.52Mbps)1.944E+07
OC-12/STM-4(622.08Mbps)7.776E+07
GigE(1000.00Mbps)1.250E+08
OC-48/STM-16(2488.32Mbps)3.110E+08
OC-192/STM-64(9953.28Mbps)1.244E+09
10GigE-LAN(10000.00Mbps)1.250E+09
OC-768/STM-256(39813.12Mbps)4.977E+09


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