diff --git a/module/core/former/src/axiomatic.rs b/module/core/former/src/axiomatic.rs
index 5eeb20c3b6..e1e24dfe2e 100644
--- a/module/core/former/src/axiomatic.rs
+++ b/module/core/former/src/axiomatic.rs
@@ -19,7 +19,7 @@ pub trait FormerDefinition
   // type Storage : Storage< Definition = Self >;
   type Storage : Storage< Formed = Self::Formed >;
   type Formed;
-  // type Context;
+  type Context;
 }
 
 // pub trait FormerDefinition
diff --git a/module/core/former/src/hash_map.rs b/module/core/former/src/hash_map.rs
index 484b1fde3d..3788eecf67 100644
--- a/module/core/former/src/hash_map.rs
+++ b/module/core/former/src/hash_map.rs
@@ -47,52 +47,55 @@ where
 
 //
 
-#[ derive( Debug ) ]
-pub struct HashMapDefinition< K, E >
+impl< K, E > Storage
+for HashMap< K, E >
 where
   K : ::core::cmp::Eq + ::core::hash::Hash,
 {
-  _phantom : ::core::marker::PhantomData< ( K, E ) >,
+  // type Definition = HashMapDefinition< K, E >;
+  type Formed = HashMap< K, E >;
 }
 
-impl< K, E > HashMapDefinition< K, E >
+impl< K, E > StoragePerform
+for HashMap< K, E >
 where
   K : ::core::cmp::Eq + ::core::hash::Hash,
 {
-  pub fn new() -> Self
+  // fn preform( self ) -> < < Self as Storage >::Definition as FormerDefinition >::Formed
+  fn preform( self ) -> Self::Formed
   {
-    Self { _phantom : ::core::marker::PhantomData }
+    self
   }
 }
 
-impl< K, E > FormerDefinition
-for HashMapDefinition< K, E >
+//
+
+#[ derive( Debug ) ]
+pub struct HashMapDefinition< K, E, Context = () >
 where
   K : ::core::cmp::Eq + ::core::hash::Hash,
 {
-  type Storage = HashMap< K, E >;
-  type Formed = HashMap< K, E >;
+  _phantom : ::core::marker::PhantomData< ( K, E, Context ) >,
 }
 
-impl< K, E > Storage
-for HashMap< K, E >
+impl< K, E, Context > HashMapDefinition< K, E, Context >
 where
   K : ::core::cmp::Eq + ::core::hash::Hash,
 {
-  // type Definition = HashMapDefinition< K, E >;
-  type Formed = HashMap< K, E >;
+  pub fn new() -> Self
+  {
+    Self { _phantom : ::core::marker::PhantomData }
+  }
 }
 
-impl< K, E > StoragePerform
-for HashMap< K, E >
+impl< K, E, Context > FormerDefinition
+for HashMapDefinition< K, E, Context >
 where
   K : ::core::cmp::Eq + ::core::hash::Hash,
 {
-  // fn preform( self ) -> < < Self as Storage >::Definition as FormerDefinition >::Formed
-  fn preform( self ) -> Self::Formed
-  {
-    self
-  }
+  type Storage = HashMap< K, E >;
+  type Formed = HashMap< K, E >;
+  type Context = Context;
 }
 
 /// A builder for constructing hash map-like structures with a fluent interface.
@@ -133,7 +136,7 @@ where
 /// # }
 /// ```
 
-pub type HashMapSubformer< K, E > = ContainerSubformer::< ( K, E ), HashMapDefinition< K, E > >;
+pub type HashMapSubformer< K, E, Context = () > = ContainerSubformer::< ( K, E ), HashMapDefinition< K, E, Context > >;
 
 // #[ derive( Debug, Default ) ]
 // pub struct HashMapSubformer< K, E, Definition, Context, End >
diff --git a/module/core/former/src/hash_set.rs b/module/core/former/src/hash_set.rs
index 66ef30e701..9d8836b6d3 100644
--- a/module/core/former/src/hash_set.rs
+++ b/module/core/former/src/hash_set.rs
@@ -35,52 +35,55 @@ where
 
 //
 
-#[ derive( Debug ) ]
-pub struct HashSetDefinition< K >
+impl< K > Storage
+for HashSet< K >
 where
   K : ::core::cmp::Eq + ::core::hash::Hash,
 {
-  _phantom : ::core::marker::PhantomData< ( K, K ) >,
+  // type Definition = HashSetDefinition< K >;
+  type Formed = HashSet< K >;
 }
 
-impl< K > HashSetDefinition< K >
+impl< K > StoragePerform
+for HashSet< K >
 where
   K : ::core::cmp::Eq + ::core::hash::Hash,
 {
-  pub fn new() -> Self
+  // fn preform( self ) -> < < Self as Storage >::Definition as FormerDefinition >::Formed
+  fn preform( self ) -> Self::Formed
   {
-    Self { _phantom : ::core::marker::PhantomData }
+    self
   }
 }
 
-impl< K > Storage
-for HashSet< K >
+//
+
+#[ derive( Debug ) ]
+pub struct HashSetDefinition< K, Context = () >
 where
   K : ::core::cmp::Eq + ::core::hash::Hash,
 {
-  // type Definition = HashSetDefinition< K >;
-  type Formed = HashSet< K >;
+  _phantom : ::core::marker::PhantomData< ( K, Context ) >,
 }
 
-impl< K > StoragePerform
-for HashSet< K >
+impl< K, Context > HashSetDefinition< K, Context >
 where
   K : ::core::cmp::Eq + ::core::hash::Hash,
 {
-  // fn preform( self ) -> < < Self as Storage >::Definition as FormerDefinition >::Formed
-  fn preform( self ) -> Self::Formed
+  pub fn new() -> Self
   {
-    self
+    Self { _phantom : ::core::marker::PhantomData }
   }
 }
 
-impl< K > FormerDefinition
-for HashSetDefinition< K >
+impl< K, Context > FormerDefinition
+for HashSetDefinition< K, Context >
 where
   K : ::core::cmp::Eq + ::core::hash::Hash,
 {
   type Storage = HashSet< K >;
   type Formed = HashSet< K >;
+  type Context = Context;
 }
 
 /// Facilitates building `HashSetLike` containers with a fluent API.
@@ -115,7 +118,7 @@ where
 /// # }
 /// ```
 
-pub type HashSetSubformer< K > = ContainerSubformer::< K, HashSetDefinition< K > >;
+pub type HashSetSubformer< K, Context = () > = ContainerSubformer::< K, HashSetDefinition< K, Context > >;
 
 // #[ derive( Debug, Default ) ]
 // pub struct HashSetSubformer< K, Definition, Context, End >
diff --git a/module/core/former/src/vector.rs b/module/core/former/src/vector.rs
index 4b056695eb..bab7601563 100644
--- a/module/core/former/src/vector.rs
+++ b/module/core/former/src/vector.rs
@@ -23,26 +23,7 @@ impl< E > VectorLike< E > for Vec< E >
   }
 }
 
-#[ derive( Debug ) ]
-pub struct VectorDefinition< E >
-{
-  _phantom : core::marker::PhantomData< E >,
-}
-
-impl< E > VectorDefinition< E >
-{
-  pub fn new() -> Self
-  {
-    Self { _phantom : core::marker::PhantomData }
-  }
-}
-
-impl< E > FormerDefinition
-for VectorDefinition< E >
-{
-  type Storage = Vec< E >;
-  type Formed = Vec< E >;
-}
+//
 
 impl< E > Storage
 for Vec< E >
@@ -61,12 +42,36 @@ for Vec< E >
   }
 }
 
+//
+
+#[ derive( Debug ) ]
+pub struct VectorDefinition< E, Context = () >
+{
+  _phantom : core::marker::PhantomData< ( E, Context ) >,
+}
+
+impl< E, Context > VectorDefinition< E, Context >
+{
+  pub fn new() -> Self
+  {
+    Self { _phantom : core::marker::PhantomData }
+  }
+}
+
+impl< E, Context > FormerDefinition
+for VectorDefinition< E, Context >
+{
+  type Storage = Vec< E >;
+  type Formed = Vec< E >;
+  type Context = Context;
+}
+
 /// A builder for constructing `VectorLike` containers, facilitating a fluent and flexible interface.
 ///
 /// `VectorSubformer` leverages the `VectorLike` trait to enable the construction and manipulation
 /// of vector-like containers in a builder pattern style, promoting readability and ease of use.
 
-pub type VectorSubformer< E > = ContainerSubformer::< E, VectorDefinition< E > >;
+pub type VectorSubformer< E, Context = () > = ContainerSubformer::< E, VectorDefinition< E, Context > >;
 
 // #[ derive( Debug, Default ) ]
 // pub struct VectorSubformer< E, Definition, Context, End >
diff --git a/module/core/former/tests/inc/former_tests/container_former_vec.rs b/module/core/former/tests/inc/former_tests/container_former_vec.rs
index 3eccc1475f..4f886ba463 100644
--- a/module/core/former/tests/inc/former_tests/container_former_vec.rs
+++ b/module/core/former/tests/inc/former_tests/container_former_vec.rs
@@ -8,6 +8,19 @@ use collection_tools::Vec;
 fn push()
 {
 
+  let got : Vec< String > = the_module::ContainerSubformer::< String, former::VectorDefinition< String, () > >::new()
+  .push( "a" )
+  .push( "b" )
+  .form();
+  let exp = vec!
+  [
+    "a".to_string(),
+    "b".to_string(),
+  ];
+  a_id!( got, exp );
+
+  //
+
   let got : Vec< String > = the_module::ContainerSubformer::< String, former::VectorDefinition< String > >::new()
   .push( "a" )
   .push( "b" )
@@ -21,7 +34,7 @@ fn push()
 
   //
 
-  let got : Vec< String > = the_module::VectorSubformer::new()
+  let got : Vec< String > = the_module::VectorSubformer::< String, () >::new()
   .push( "a" )
   .push( "b" )
   .form();