# NAME in vtk.module files
**URL:** https://discourse.vtk.org/t/name-in-vtk-module-files/7964
**Category:** Support
**Created:** [March 3, 2022, 10:07am UTC](https://discourse.vtk.org/t/name-in-vtk-module-files/7964 "2022-03-03T10:07:48Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@aborsic](https://discourse.vtk.org/u/aborsic)
#### Post date: [March 3, 2022, 10:07am UTC](https://discourse.vtk.org/t/name-in-vtk-module-files/7964/1 "2022-03-03T10:07:48Z")
Dear All,
I wonder if anybody can shed some light on some doubts I have about the NAME field in vtk.module files.
The documentation at [vtk.module files](https://vtk.org/doc/nightly/html/group__module.html#module-parse-module) says that NAME is the name of the module, and the example uses NAME = VTK::CommonCore
What is the meaning here of the two parts VTK and CommonCore? In the sense, if developing a module external to VTK, should it be named still VTK::MyModule or XXXYYY::MyModule ?
What is the effect of the prefix before “::” ? Does it work like a C++ namespace? In that case does it influence in any manner the source code of the developed new classes?
Thanks for any insight !
Best Regards,
Andrea
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### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [March 4, 2022, 8:32am UTC](https://discourse.vtk.org/t/name-in-vtk-module-files/7964/2 "2022-03-04T08:32:54Z")
> [@aborsic](#):
>
> What is the effect of the prefix before “::” ?
It is only used by CMake in the target name afaik
> [@](#):
>
> Does it work like a C++ namespace? In that case does it influence in any manner the source code of the developed new classes?
No
@ben.boeckel may know more.
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### Author:  [@aborsic](https://discourse.vtk.org/u/aborsic)
#### Post date: [March 4, 2022, 1:01pm UTC](https://discourse.vtk.org/t/name-in-vtk-module-files/7964/3 "2022-03-04T13:01:19Z")
Thank you so much Mathieu.
Out of curiosity, is the double colon :: required ? (I will try compiling with and without …)
Best Regards,
Andrea
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### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [March 4, 2022, 1:56pm UTC](https://discourse.vtk.org/t/name-in-vtk-module-files/7964/4 "2022-03-04T13:56:35Z")
No, you can not put any :: in your own module.
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### Author:  [@ben.boeckel](https://discourse.vtk.org/u/ben.boeckel)
#### Post date: [March 4, 2022, 11:30pm UTC](https://discourse.vtk.org/t/name-in-vtk-module-files/7964/5 "2022-03-04T23:30:29Z")
If you use it, the part before the `::` is the “package”. Since VTK’s CMake package name is “VTK”, it uses that as its prefix and “namespace”.