diff --git a/Data-model.md b/Data-model.md
index 52efb91..f5f3921 100644
--- a/Data-model.md
+++ b/Data-model.md
@@ -224,7 +224,7 @@ Rivers data is stored as an unordered array of objects (so element id is _not_ t
 
 ## Markers [WIP]
 Markers data is stored as an unordered array of objects (so element id is _not_ the array index). Object structure:
-* `i`: `number` - marker id. `'markerElement' + i` is used as marker element id and reference in `notes` object 
+* `i`: `number` - marker id. `'marker' + i` is used as svg element id and marker reference in `notes` object 
 * `icon`: `number` - unicode character
 * `type`: `string` - optional, used only for auto-generated markers
 * `x`: `number` - marker x coordinate