# GR 3.7 Namespace Question **URL:** \ **Category:** GNU Radio\ **Created:** [May 2, 2014, 4:33pm UTC](https://www.ruby-forum.com/t/gr-3-7-namespace-question/240840 "2014-05-02T16:33:51Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Post date:** [May 2, 2014, 4:33pm UTC](https://www.ruby-forum.com/t/gr-3-7-namespace-question/240840/1 "2014-05-02T16:33:51Z")
With the new use of C++ namespaces in the 3.7 API, is it possible for an Out-of-tree (OOT) module to create blocks that are part of an existing GR namespace? For instance, if I have a new block that processes digital data streams, can I create an OOT module called “digital” and add my block to it? Or will this cause a confusion at link time, by creating two libraries with the same name? @(^.^)@ Ed ---
**Author:** ![Ed\_Criscuolo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/e/ac8455/32.png) [@Ed\_Criscuolo](https://www.ruby-forum.com/u/Ed_Criscuolo)\ **Post date:** [May 2, 2014, 4:43pm UTC](https://www.ruby-forum.com/t/gr-3-7-namespace-question/240840/2 "2014-05-02T16:43:04Z")
Hi Ed - Are you asking whether you can reuse the same namespace and block name with an OOT module? If so, then so long as you don’t load the library containing the GR-provided block(s), you can make it work – it’s a C++ issue rather than anything else. That said, it would generally be better if you named your block something else to help distinguish it from what GR provides – unless what you want is intentionally a drop-in replacement for what GR provides. In C++ you can add to a namespace if you want to, so long as what you’re adding augments, does not conflict with nor try to replace, what’s already there. Not sure if this is what you were looking for, but maybe this helps? - MLD