diff --git a/src/dofs/entity_dofs.jl b/src/dofs/entity_dofs.jl
deleted file mode 100644
index e63d3dd..0000000
--- a/src/dofs/entity_dofs.jl
+++ /dev/null
@@ -1,168 +0,0 @@
-# This file is a part of JuliaFEM.
-# License is MIT: see https://github.com/JuliaFEM/JuliaFEM.jl/blob/master/LICENSE
-
-"""
-Entity-Based DOF Implementations
-
-This file provides convenient type aliases and helper functions for common
-DOF patterns using the entity-based DOF system.
-
-The core type `DOF{T, E<:TopologicalEntity}` is defined in api.jl.
-This file adds convenience constructors and commonly used patterns.
-"""
-
-# ============================================================================
-# Convenience Type Aliases
-# ============================================================================
-
-"""
-    ScalarDOF{E<:TopologicalEntity}
-
-Type alias for scalar DOFs at entities.
-
-# Examples
-```julia
-ScalarDOF{Vertex}      # Scalar at vertices (any topology)
-ScalarDOF{Edge}        # Scalar on edges (any topology)
-ScalarDOF{Face}        # Scalar on faces (any topology)
-```
-
-Equivalent to `DOF{Vec{1}, E}` (scalar as 1-component vector).
-"""
-const ScalarDOF{E} = DOF{Vec{1}, E} where {E<:TopologicalEntity}
-
-"""
-    VectorDOF{D, E<:TopologicalEntity}
-
-Type alias for D-dimensional vector DOFs at entities.
-
-# Examples
-```julia
-VectorDOF{2, Vertex}   # 2D displacement at vertices
-VectorDOF{3, Vertex}   # 3D displacement at vertices
-VectorDOF{3, Edge}     # 3D field on edges
-```
-
-Equivalent to `DOF{Vec{D}, E}`.
-"""
-const VectorDOF{D, E} = DOF{Vec{D}, E} where {D, E<:TopologicalEntity}
-
-"""
-    TensorDOF{D, E<:TopologicalEntity}
-
-Type alias for D×D tensor DOFs at entities.
-
-# Examples
-```julia
-TensorDOF{2, Vertex}   # 2D stress/strain at vertices
-TensorDOF{3, Vertex}   # 3D stress/strain at vertices
-```
-
-Equivalent to `DOF{Tensor{2,D}, E}`.
-"""
-const TensorDOF{D, E} = DOF{Tensor{2,D,Float64}, E} where {D, E<:TopologicalEntity}
-
-# ============================================================================
-# Common DOF Patterns
-# ============================================================================
-
-# Standard Lagrange element DOF types for common problems
-const LagrangeHeat1D = DOF{Vec{1}, Vertex}
-const LagrangeHeat2D = DOF{Vec{1}, Vertex}
-const LagrangeHeat3D = DOF{Vec{1}, Vertex}
-
-const LagrangeElasticity1D = DOF{Vec{1}, Vertex}
-const LagrangeElasticity2D = DOF{Vec{2}, Vertex}
-const LagrangeElasticity3D = DOF{Vec{3}, Vertex}
-
-# Nédélec (H(curl)) element DOF types for electromagnetic problems
-const NedelecScalar1D = DOF{Vec{1}, Edge}
-const NedelecScalar2D = DOF{Vec{1}, Edge}
-const NedelecScalar3D = DOF{Vec{1}, Edge}
-const NedelecVector3D = DOF{Vec{3}, Edge}
-
-# Raviart-Thomas (H(div)) element DOF types for fluid flow problems
-const RaviartThomasScalar2D = DOF{Vec{1}, Face}
-const RaviartThomasScalar3D = DOF{Vec{1}, Face}
-const RaviartThomasVector3D = DOF{Vec{3}, Face}
-
-# Discontinuous Galerkin (DG) element DOF types
-const DGScalar = DOF{Vec{1}, Cell}
-const DGVector2D = DOF{Vec{2}, Cell}
-const DGVector3D = DOF{Vec{3}, Cell}
-
-# ============================================================================
-# Helper Functions
-# ============================================================================
-
-"""
-    make_vertex_dof(::Type{T}) where T
-
-Create DOF type for quantity T at vertices.
-
-Topology context comes from Element.
-
-# Examples
-```julia
-make_vertex_dof(Vec{1})    # DOF{Vec{1}, Vertex}
-make_vertex_dof(Vec{3})    # DOF{Vec{3}, Vertex}
-```
-"""
-make_vertex_dof(::Type{T}) where T = DOF{T, Vertex}
-
-"""
-    make_edge_dof(::Type{T}) where T
-
-Create DOF type for quantity T on edges.
-
-Topology context comes from Element.
-
-# Examples
-```julia
-make_edge_dof(Vec{1})      # DOF{Vec{1}, Edge}
-make_edge_dof(Vec{3})      # DOF{Vec{3}, Edge}
-```
-"""
-make_edge_dof(::Type{T}) where T = DOF{T, Edge}
-
-"""
-    make_face_dof(::Type{T}) where T
-
-Create DOF type for quantity T on faces.
-
-Topology context comes from Element.
-
-# Examples
-```julia
-make_face_dof(Vec{1})      # DOF{Vec{1}, Face}
-make_face_dof(Vec{3})      # DOF{Vec{3}, Face}
-```
-"""
-make_face_dof(::Type{T}) where T = DOF{T, Face}
-
-"""
-    make_cell_dof(::Type{T}) where T
-
-Create DOF type for quantity T in cell interior.
-
-Topology context comes from Element.
-
-# Examples
-```julia
-make_cell_dof(Vec{1})      # DOF{Vec{1}, Cell}
-make_cell_dof(Vec{3})      # DOF{Vec{3}, Cell}
-```
-"""
-make_cell_dof(::Type{T}) where T = DOF{T, Cell}
-
-# ============================================================================
-# Exports
-# ============================================================================
-
-export ScalarDOF, VectorDOF, TensorDOF,
-       LagrangeHeat1D, LagrangeHeat2D, LagrangeHeat3D,
-       LagrangeElasticity1D, LagrangeElasticity2D, LagrangeElasticity3D,
-       NedelecScalar1D, NedelecScalar2D, NedelecScalar3D, NedelecVector3D,
-       RaviartThomasScalar2D, RaviartThomasScalar3D, RaviartThomasVector3D,
-       DGScalar, DGVector2D, DGVector3D,
-       make_vertex_dof, make_edge_dof, make_face_dof, make_cell_dof