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+# IOAble (Container must be IO oriented)
+
+## Abstract:
+
+- Introduced: OCL v1.7
+- Purpose: Gives a container the methods to communicate with injectors such as transaction<IOAble>, or std::ostream<IOAble>.
+
+## Example:
+
+```cpp
+   struct IORound {
+    long operator>>(float); 
+    float operaotr<<(long);
+    long operator*(); // latest IO value (copy-constructable). 
+   };
+```
+
+## Sources:
+
+- https://en.cppreference.com/w/cpp/named_req/CopyConstructible.html
+
+
+