diff --git a/chapters/02_economy.md b/chapters/02_economy.md
index 4701ed3..8c76a20 100644
--- a/chapters/02_economy.md
+++ b/chapters/02_economy.md
@@ -1,3 +1,21 @@
 _can documentation trigger different kinds of economy around software?_
 
 -   360 degrees of proximity
+
+---
+
+Software documentation comes in different formats.
+
+The Díataxis framework (Procida, 2017) maps them into four main quadrants using a systematic approach. It focuses on four main needs of the user: to learn, to understand, to get the work done, and to gather specific informations.
+
+In this thesis the term documentation is less structured: it tries to encompass different forms of care. Instead of prescribing the recipe for a perfect solution, it attempts to describe a surface, and ways to navigate it.
+
+Expanding the four quadrants, mixing them we can include transversal practices like that proposed for _360 degrees of proximity_.
+
+---
+
+not a rigid framework
+but a surface: a set of practices
+something to be negotiated and expanded
+
+example: a practice that gets instantiated in the form of workshop (_360 degrees of proximity_)
diff --git a/chapters/03_world.md b/chapters/03_world.md
index d5114f5..b83eae0 100644
--- a/chapters/03_world.md
+++ b/chapters/03_world.md
@@ -1,4 +1,6 @@
-_be an ideal surface to build worlds?_
+_can documentation be an ideal surface to build worlds?_
 
 -   the screenless office
 -   ian cheng
+
+---