Adds code overview SVG contributed by Jvdjvdjvd

Author: sjoerdk

dicomtrolley/qido_rs.py

@@ -374,7 +374,7 @@ def check_for_response_errors(response):
 
     @classmethod
     def ensure_query_type(cls, query: Query) -> QidoRSQueryBase:
-        """Make sure query is of a type usable in this searcher. Cast if needed
+        """Make sure query is of a type usable in this searcher. Cast if needed.
 
         Separate casting method needed in addition to Query.init_from_query()
         To properly handle the two QIDO-RS query types

docs/code.md

@@ -0,0 +1,13 @@
+# Code
+
+Information about the code structure of dicomtrolley. Meant for developers seeking to 
+[contribute](contributing.md) to the project. For quick examples see [usage](usage.md).
+For a more high-level overview of dicomtrolley concepts see [concepts](concepts.md).
+
+## Code documentation  
+You can find documentation and code for all python classes in the [API reference](reference/SUMMARY.md)
+
+## Class structure
+Python class relations for some core dicomtrolley classes.
+
+[![object types diagram](resources/object_types_trolley.svg)](resources/object_types_trolley.svg)

docs/resources/object_types_trolley.svg

@@ -5,6 +5,7 @@ nav:
   - Usage: usage.md
   - Concepts:  concepts.md
   - Authentication: authentication.md
+  - Code: code.md
   - Contributing: contributing.md
 - API Reference: reference/dicomtrolley/*