--- a/src/Grids/EquidistantGrid.jl	Sun Jan 31 13:13:06 2021 +0100
+++ b/src/Grids/EquidistantGrid.jl	Sun Jan 31 20:59:29 2021 +0100
@@ -46,10 +46,7 @@
 
 The dimension of the grid.
 """
-function dimension(grid::EquidistantGrid)
-    return length(grid.size)
-end
-
+dimension(grid::EquidistantGrid{Dim}) where Dim = Dim
 
 """
     spacing(grid::EquidistantGrid)
@@ -95,3 +92,15 @@
     return EquidistantGrid(size, limit_lower, limit_upper)
 end
 export restrict
+
+"""
+    boundary_identifiers(::EquidistantGrid)
+
+Returns a tuple containing the boundary identifiers for the grid, stored as
+	(CartesianBoundary(1,Lower),
+	 CartesianBoundary(1,Upper),
+	 CartesianBoundary(2,Lower),
+	 ...)
+"""
+boundary_identifiers(g::EquidistantGrid) = (((ntuple(i->(CartesianBoundary{i,Lower}(),CartesianBoundary{i,Upper}()),dimension(g)))...)...,)
+export boundary_identifiers