diff --git a/README.md b/README.md
index 8123c47..408d6ee 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,13 @@ methodologies, defines all the key terms, and contains detailed examples.
 | [Navigator Layers](https://github.com/center-for-threat-informed-defense/sensor-mappings-to-attack/tree/main/mappings/layers/enterprise)                                               | ATT&CK Navigator views of the Sensor Mappings.   |
 | [STIX Bundles](https://github.com/center-for-threat-informed-defense/sensor-mappings-to-attack/tree/main/mappings/stix/enterprise)                                                     | Machine-readable list of Sensor Mappings.        |
 
+The initial SMAP work was developed using ATT&CKv13.1. The mappings include some data 
+components that are not represented in ATT&CKv13.1 and may not be represented in more 
+recent versions of ATT&CK. The reason for this is that ATT&CK does not include data 
+components that do not currently have a relationship to a (sub-)technique. These 
+mapped data components are being tracked by the ATT&CK team and will be considered for 
+incorporation in future versions of ATT&CK as the overall ATT&CK catalog evolves.
+
 ## Getting Involved
 
 There are several ways that you can get involved with this project and help advance
diff --git a/docs/example_technique_mappings/index.rst b/docs/example_technique_mappings/index.rst
index 561d594..c145b2a 100644
--- a/docs/example_technique_mappings/index.rst
+++ b/docs/example_technique_mappings/index.rst
@@ -18,3 +18,10 @@ looking to provide insight into a specific environment.
     linux
     cloudtrail
     network
+
+Note that the initial SMAP work was developed using ATT&CKv13.1. The mappings include
+some data components that are not represented in ATT&CKv13.1 and may not be represented
+in more recent versions of ATT&CK. The reason for this is that ATT&CK does not include 
+data components that do not currently have a relationship to a (sub-)technique. These 
+mapped data components are being tracked by the ATT&CK team and will be considered for 
+incorporation in future versions of ATT&CK as the overall ATT&CK catalog evolves.
\ No newline at end of file
diff --git a/docs/levels/index.rst b/docs/levels/index.rst
index 736b5ea..a76b316 100644
--- a/docs/levels/index.rst
+++ b/docs/levels/index.rst
@@ -6,6 +6,13 @@ which gather data from endpoints in the environment (e.g., Windows, Linux), and
 Sensors, which gather data gather from network communications, typically outbound
 connections.
 
+The initial SMAP work was developed using ATT&CKv13.1. The mappings include some data 
+components that are not represented in ATT&CKv13.1 and may not be represented in more
+recent versions of ATT&CK. The reason for this is that ATT&CK does not include data
+components that do not currently have a relationship to a (sub-)technique. These 
+mapped data components are being tracked by the ATT&CK team and will be considered for 
+incorporation in future versions of ATT&CK as the overall ATT&CK catalog evolves.
+
 View Mappings
 -------------
 
diff --git a/docs/methodology/step2.rst b/docs/methodology/step2.rst
index d5e2634..c310a40 100644
--- a/docs/methodology/step2.rst
+++ b/docs/methodology/step2.rst
@@ -50,6 +50,13 @@ pages provide definitions for each individual Data Source.
 .. image:: ../_static/attack_ex_pc.png
    :width: 600
 
+Note that the initial SMAP work was developed using ATT&CKv13.1. The mappings include
+some data components that are not represented in ATT&CKv13.1 and may not be represented
+in more recent versions of ATT&CK. The reason for this is that ATT&CK does not include 
+data components that do not currently have a relationship to a (sub-)technique. These 
+mapped data components are being tracked by the ATT&CK team and will be considered for 
+incorporation in future versions of ATT&CK as the overall ATT&CK catalog evolves.
+
 For Process Creation, ATT&CK's definition is : **..the initial construction of an
 executable..**. Through key word review, it can be determined that this is the same as
 **..a process is created..** Therefore, event ID 4688 can be linked with this ATT&CK
diff --git a/docs/overview.rst b/docs/overview.rst
index 433577d..1653ee3 100644
--- a/docs/overview.rst
+++ b/docs/overview.rst
@@ -16,6 +16,13 @@ to answer questions such as:
 - If I'm concerned about a recent threat report, how can I look for that threat in my
   environment?
 
+The initial SMAP work was developed using ATT&CKv13.1. The mappings include some data 
+components that are not represented in ATT&CKv13.1 and may not be represented in more 
+recent versions of ATT&CK. The reason for this is that ATT&CK does not include data 
+components that do not currently have a relationship to a (sub-)technique. These 
+mapped data components are being tracked by the ATT&CK team and will be considered for 
+incorporation in future versions of ATT&CK as the overall ATT&CK catalog evolves.
+
 Background
 ----------