diff --git a/src/Constraints.jl b/src/Constraints.jl
index 5827942..d8d2446 100644
--- a/src/Constraints.jl
+++ b/src/Constraints.jl
@@ -38,8 +38,8 @@ include("constraint.jl")
 ## SECTION - Usual constraints (based on and including XCSP3-core categories)
 include("usual_constraints.jl")
 
-# SECTION - Generic Constraints: intension, extension
-include("constraints/intension.jl")
+# SECTION - Generic Constraints: intention, extension
+include("constraints/intention.jl")
 include("constraints/extension.jl")
 
 # SECTION - Constraints defined from Languages
diff --git a/src/constraints/intension.jl b/src/constraints/intention.jl
similarity index 85%
rename from src/constraints/intension.jl
rename to src/constraints/intention.jl
index aa71b17..421f9df 100644
--- a/src/constraints/intension.jl
+++ b/src/constraints/intention.jl
@@ -23,11 +23,27 @@ concept(:dist_different)(x)
 ```
 
 # Examples
-```julia
+
+````@example debug2
+2 + 2
+````
+
+```@example debug1
+2 + 2
+```
+
+```@example intention1
+using Constraints # hide
 c = concept(:dist_different)
-c([1, 2, 3, 3]) # true
-c([1, 2, 3, 4]) # false
+c([1, 2, 3, 3]) && !c([1, 2, 3, 4])
 ```
+
+````@example intention2
+using Constraints # hide
+c = concept(:dist_different)
+c([1, 2, 3, 3]) && !c([1, 2, 3, 4])
+````
+
 """
 xcsp_intension(; list, predicate) = predicate(list)
 
diff --git a/src/usual_constraints.jl b/src/usual_constraints.jl
index c37b500..729a272 100644
--- a/src/usual_constraints.jl
+++ b/src/usual_constraints.jl
@@ -225,6 +225,7 @@ concept(:all_different, [1, 2, 3])
 ```
 """
 concept(s::Symbol, args...; kargs...) = concept(USUAL_CONSTRAINTS[s])(args...; kargs...)
+concept(s::Symbol) = concept(USUAL_CONSTRAINTS[s])
 
 ## SECTION - Test Items
 @testitem "Usual constraints" tags = [:usual, :constraints] default_imports = false begin