README.md

README.md

@@ -6,5 +6,22 @@ industrial-grade robots in Rust.
 Note: the crate is actively developed. API can be changed at any time. Use at
 your own risk!
 
-RoboPLC is a component of [EVA ICS](https://www.eva-ics.com/) industrial
+RoboPLC is a part of [EVA ICS](https://www.eva-ics.com/) industrial
 automation platform.
+
+## DataBuffer
+
+[`buf::DataBuffer`] covers a typical data exchange pattern when data
+frames are collected (cached) by a single or multiple producers, then taken by
+a single consumer in bulk and submitted, e.g. into a local database or into
+an external bus.
+
+<img
+src="https://raw.githubusercontent.com/eva-ics/roboplc/main/schemas/databuffer.png"
+width="350" />
+
+* always has got a fixed capacity
+
+* thread-safe out-of-the-box
+
+* frames may be forcibly pushed, overriding the previous ones, like in a ring-buffer.