diff --git a/crates/i18n/src/lib.rs b/crates/i18n/src/lib.rs
index 718af8c..d84463b 100644
--- a/crates/i18n/src/lib.rs
+++ b/crates/i18n/src/lib.rs
@@ -11,6 +11,8 @@
 //! 
 //! * i18n_pattern-rizzen-yazston
 //! 
+//! * i18n_message-rizzen-yazston
+//! 
 //! # Usage
 //! 
 //! For most use cases, just the use of `i18n-rizzen-yazston` crate will be sufficient to use the multilingual message
@@ -21,7 +23,7 @@
 //! ```
 //! [dependencies]
 //! icu_locid = "1.0.0"
-//! i18n-rizzen-yazston = "0.3.1"
+//! i18n-rizzen-yazston = "0.4.0"
 //! ```
 //! 
 //! ## Examples
@@ -29,6 +31,6 @@
 //! See the various component crates for usage examples.
 
 pub use i18n_lstring-rizzen-yazston as lstring;
-pub use i18n_lexer-rizzen-yazston as lexer;
+pub use i18n_lexer-rizzen-yazston as pattern;
 pub use i18n_pattern-rizzen-yazston as pattern;
-//pub use i18n_message-rizzen-yazston as message;
+pub use i18n_message-rizzen-yazston as message;
diff --git a/crates/message/Cargo.toml b/crates/message/Cargo.toml
index 7bcaaee..e1efe70 100644
--- a/crates/message/Cargo.toml
+++ b/crates/message/Cargo.toml
@@ -27,6 +27,8 @@ publish = false
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+icu_locid = "1.0.0"
+i18n_lstring-rizzen-yazston = { version = "0.3.0", path = "../lstring" }
 i18n_lexer-rizzen-yazston = { version = "0.3.0", path = "../lexer" } # Needed for Token, TokenType
 i18n_pattern-rizzen-yazston = { version = "0.3.0", path = "../pattern" }
 tree-rizzen-yazston = { version = "0.2.0", path = "../../../tree" }
diff --git a/crates/message/src/formatter.rs b/crates/message/src/formatter.rs
new file mode 100644
index 0000000..96baa53
--- /dev/null
+++ b/crates/message/src/formatter.rs
@@ -0,0 +1,70 @@
+// This file is part of `i18n_message-rizzen-yazston` crate. For the terms of use, please see the file
+// called `LICENSE-BSD-3-Clause` at the top level of the `i18n_message-rizzen-yazston` crate.
+
+//! TODO: Complete crate description
+//! 
+//! # Examples
+//! 
+//! ```
+//! // TODO: crate example
+//! ```
+
+use icu_locid::Locale;
+use std::rc::Rc;
+use i18n_lstring::LString;
+use i18n_lexer::{Lexer, Token, TokenType};
+use tree::{Tree, NodeFeatures};
+use i18n_pattern::{NodeType, parse};
+use std::collections::HashMap;
+//use std::fmt; this is needed if implementing Display on something
+
+pub struct System {
+    lexer: Lexer,
+}
+
+impl System {
+    pub fn try_new( lexer: Lexer ) -> Result<Self, String> {
+        
+    }
+}
+
+pub struct Formatter {
+    locale: Rc<Locale>,
+    ast: Tree,
+}
+
+impl Formatter {
+
+    /// Creates a Formatter for the language string.
+    pub fn try_new( string: LString ) -> Result<Self, String> {
+        Err( "Temporary error until implemented.".to_string() )
+    }
+    
+    /// Format the language string with supplied values.
+    pub fn format( self ) -> Result<LString, String> {
+        Err( "Temporary error until implemented.".to_string() )
+    }
+
+
+}
+
+
+
+
+
+
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use icu_testdata::buffer;
+
+    #[test]
+    fn test1() {
+    }
+
+    #[test]
+    fn test2() {
+    }
+}
+
diff --git a/crates/message/src/lib.rs b/crates/message/src/lib.rs
index 02e3a6f..182a294 100644
--- a/crates/message/src/lib.rs
+++ b/crates/message/src/lib.rs
@@ -1,32 +1,11 @@
 // This file is part of `i18n_message-rizzen-yazston` crate. For the terms of use, please see the file
-// called `LICENSE-BSD-3-Clause` at the top level of the `i18n_message-rizzen-yazston` crate.
+// called LICENSE-BSD-3-Clause at the top level of the `i18n_message-rizzen-yazston` crate.
 
-//! TODO: Complete crate description
-//! 
-//! # Examples
-//! 
-//! ```
-//! // TODO: crate example
-//! ```
-
-use i18n_lexer::{Lexer, Token, TokenType};
-use std::rc::Rc;
-use tree::{Tree, NodeFeatures};
-use i18n_pattern::{NodeType, parse};
-use std::collections::HashMap;
-//use std::fmt; this is needed if implementing Display on something
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use icu_testdata::buffer;
-
-    #[test]
-    fn test1() {
-    }
-
-    #[test]
-    fn test2() {
-    }
-}
+//! The `i18n_message` crate contains the messaging system.
+//!
+//! Contains the follow modules:
+//!
+//! * `formatter`: Takes an AST with supplied values to create a language string of the specified `Locale`.
 
+pub mod formatter;
+pub use formatter::*;