Added ADR 10 - binary compatablity

doc/adr/0008-use-java-lts-versions.md

@@ -7,6 +7,7 @@ Date: 10 Apr 2022
 Accepted
 
 * Supersedes [ADR 2](0002-implement-as-Java.md)
+* Extended by [ADR 10](0010-binary-compatability-to-java-lts-version-minus-2.md) 
 
 ## Context
 

doc/adr/0010-binary-compatability-to-java-lts-version-minus-2.md

@@ -0,0 +1,35 @@
+# 10. Binary compatability to Java LTS version minus 2
+
+Date: 2 Sept 2024
+
+## Status
+
+Proposed
+
+* Extends [ADR 8](0008-use-java-lts-versions.md)
+
+
+## Context
+
+[ADR 8](0008-use-java-lts-versions.md) specifies that `adr-j` is always developed using the latest Java LTS version. However, many organisations are not using the latest LTS version of Java. 
+
+Binary compatability with earlier versions could be provided, but this is taken too far it can be restrictive in the further development of `adr-j`. 
+
+## Decision
+
+We will provide binary compatablity with the two previous LTS versions of Java. 
+
+## Consequences
+
+* Relatively new Java features can be used in the development.  
+* The lowest supported version is always deprecated. 
+* Versions before the deprecated version are not supported. 
+
+
+For instance:
+
+| Development | Binary compatability | Deprecated | Not supported      |
+| ----------- | -------------------- | ---------- | ------------------ |
+| Java 21     | Java 17, Java 11     | Java 11    | Java 8 and before  |
+| Java 25 (*planned 3Q25*) | Java 21, Java 17     | Java 17    | Java 11 and before |
+