diff --git a/doc/DevopsBuild.md b/doc/DevopsBuild.md
index 16e63d2..f753a39 100644
--- a/doc/DevopsBuild.md
+++ b/doc/DevopsBuild.md
@@ -5,7 +5,7 @@ DevopsBuild stellt die build Grundlagen zur Verfügung.
 ```mermaid
 classDiagram
     class DevopsBuild {
-        name() - thename of build
+        name() - the name of build
         build_path() - the build dir in target
         initialize_build_dir() - copy current directory & additional files to target
     }
diff --git a/doc/architecture/Architecture.md b/doc/architecture/Architecture.md
index 3412691..a4922b2 100644
--- a/doc/architecture/Architecture.md
+++ b/doc/architecture/Architecture.md
@@ -14,6 +14,7 @@
       Rel(buildAndMixin,dom, "use")
       Rel(app, dom, "use")
       Rel(app, infra, "use")
+      Rel(infra, dom, "use")
 
       UpdateLayoutConfig($c4ShapeInRow="2", $c4BoundaryInRow="1")
       
diff --git a/doc/architecture/Domain.md b/doc/architecture/Domain.md
index 778f1dd..8148756 100644
--- a/doc/architecture/Domain.md
+++ b/doc/architecture/Domain.md
@@ -126,7 +126,8 @@ classDiagram
     BuildFile *-- "1" Version
     C4k *-- DnsRecord: dns_record
     ProvsK3s *-- DnsRecord: provision_dns
-    Credentials *-- "0..n" CredentialMapping: mappings
+    Credentials *-- "0..n" CredentialMapping: mappings[name]
+    Credentials *-- "0..n" CredentialMapping: default_mappings
     
 ```
 
diff --git a/src/main/python/ddadevops/domain/build_file.py b/src/main/python/ddadevops/domain/build_file.py
index c7537a8..018fba3 100644
--- a/src/main/python/ddadevops/domain/build_file.py
+++ b/src/main/python/ddadevops/domain/build_file.py
@@ -113,3 +113,9 @@ class BuildFile(Validateable):
                     self.content = substitute
         except:
             raise Exception(f"Version not found in file {self.file_path}")
+
+    def __eq__(self, other):
+        return other and self.file_path == other.file_path
+
+    def __hash__(self) -> int:
+        return self.file_path.__hash__()