diff --git a/doc/topo-v1.ditaa b/doc/topo-v1.ditaa
new file mode 100644
index 00000000..0bc79eb1
--- /dev/null
+++ b/doc/topo-v1.ditaa
@@ -0,0 +1,63 @@
+   /------------\  /------------\  /------------\
+   |     app    |  |     app    |  |     app    |
+   |------------|  |------------|  |------------|  x N
+   | PUSH | SUB |  | PUSH | SUB |  | PUSH | SUB |
+   \------------/  \------------/  \------------/
+      |     ^        |     ^        |     ^
+      |     |        |     |        |     |
+      +-------------++--------------+     |
+            |       |      |              |
+            +-------|------+--------------+
+                    |      |
+                    v      |
+                /--------------\
+                |  PULL | PUB  |
+                |--------------|
+----------------| app endpoint |-----------------  x N
+                |--------------|
+                |    DEALER    |
+                \--------------/
+                        ^
+                        |
+       +----------------+----------------+
+       |                |                |
+       v                v                v
+/-------------\  /-------------\  /-------------\
+|    DEALER   |  |    DEALER   |  |    DEALER   |
+|-------------|  |-------------|  |-------------|
+| coordinator |  | coordinator |  | coordinator |  x N
+|-------------|  |-------------|  |-------------|
+|    DEALER   |  |    DEALER   |  |    DEALER   |
+\-------------/  \-------------/  \-------------/
+       ^                ^                ^
+       |                |                |
+       +----------------+----------------+
+                        |
+                        v
+                 /--------------\
+                 |    DEALER    |
+                 |--------------|
+-----------------| dev endpoint |----------------  x N
+                 |--------------|
+                 |  PULL | PUB  |
+                 \--------------/
+                     ^      |
+                     |      |
+             +-------|------+----------------+
+             |       |      |                |
+       +-------------+-+---------------+     |
+       |     |         |    |          |     |
+       |     v         |    v          |     v
+   /------------\  /------------\  /------------\
+   | PUSH | SUB |  | PUSH | SUB |  | PUSH | SUB |
+   |------------|  |------------|  |------------|  x N
+   |     dev    |  |     dev    |  |     dev    |
+   \------------/  \------------/  \------------/
+          ^               ^               ^
+          :               :               :
+          +---------------+---------------+
+                          :
+                          v
+                    /----------\
+                    | provider |
+                    \----------/