# What does 'using ..SomeMudule' mean?

**URL:** <https://discourse.julialang.org/t/what-does-using-somemudule-mean/108655>\
**Category:** General Usage\
**Tags:** question\
**Created:** [January 11, 2024, 2:16am UTC](https://discourse.julialang.org/t/what-does-using-somemudule-mean/108655 "2024-01-11T02:16:21Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![jiang\_ming\_zhang](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jiang_ming_zhang/32/204063_2.png) [@jiang\_ming\_zhang](https://discourse.julialang.org/u/jiang_ming_zhang)\
**Post date:** [January 11, 2024, 2:16am UTC](https://discourse.julialang.org/t/what-does-using-somemudule-mean/108655/1 "2024-01-11T02:16:21Z")

</div>

What does the two dots mean? I guess it is path relevant.

---

<div class="post-metadata">

**Author:** ![goerz](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/goerz/32/3269_2.png) [@goerz](https://discourse.julialang.org/u/goerz)\
**Post date:** [January 11, 2024, 2:47am UTC](https://discourse.julialang.org/t/what-does-using-somemudule-mean/108655/2 "2024-01-11T02:47:49Z")

</div>

It relates to nested modules. The two dots refer to a sibling module:

```julia
julia> module A      
       module B      
        f() = 1     
       end           
       module C      
        using ..B: f 
        g() = f()  
       end           
       end           
Main.A               
                     
julia> Main.A.C.g() 
1                    

```