3 files changed, 30 insertions, 5 deletions
diff --git a/src/core/model/Document.cpp b/src/core/model/Document.cpp
index 76835a1..2fcd20d 100644
--- a/src/core/model/Document.cpp
+++ b/src/core/model/Document.cpp
@@ -724,6 +724,7 @@ void Document::doResolve(ResolutionState &state)
 		continueResolveCompositum(root, state);
 	}
 	continueResolveReferences(domains, state);
+	continueResolveReferences(typesystems, state);
 }
 
 bool Document::doValidate(Logger &logger) const
@@ -763,11 +764,14 @@ void Document::doReference(Handle<Node> node)
 	if (node->isa(&RttiTypes::Domain)) {
 		referenceDomain(node.cast<Domain>());
 	}
+	if (node->isa(&RttiTypes::Typesystem)) {
+		referenceTypesystem(node.cast<Typesystem>());
+	}
 }
 
 RttiSet Document::doGetReferenceTypes() const
 {
-	return RttiSet{&RttiTypes::Domain};
+	return RttiSet{&RttiTypes::Domain, &RttiTypes::Typesystem};
 }
 
 Rooted<StructuredEntity> Document::createRootStructuredEntity(
@@ -871,4 +875,4 @@ const Rtti AnnotationEntity =
         .parent(&Node)
         .composedOf({&StructuredEntity, &DocumentPrimitive, &Anchor});
 }
-}
-\ No newline at end of file
+}
diff --git a/src/core/model/Document.hpp b/src/core/model/Document.hpp
index 57a4b1a..6903bb3 100644
--- a/src/core/model/Document.hpp
+++ b/src/core/model/Document.hpp
@@ -875,6 +875,7 @@ private:
 	Owned<StructuredEntity> root;
 	NodeVector<AnnotationEntity> annotations;
 	NodeVector<Domain> domains;
+	NodeVector<Typesystem> typesystems;
 
 protected:
 	void doResolve(ResolutionState &state) override;
@@ -892,7 +893,8 @@ public:
 	Document(Manager &mgr, std::string name)
 	    : RootNode(mgr, std::move(name), nullptr),
 	      annotations(this),
-	      domains(this)
+	      domains(this),
+	      typesystems(this)
 	{
 	}
 
@@ -1012,6 +1014,25 @@ public:
 	}
 
 	/**
+	 * Adds a Typesystem reference to this Document.
+	 */
+	void referenceTypesystem(Handle<Typesystem> d)
+	{
+		invalidate();
+		typesystems.push_back(d);
+	}
+
+	/**
+	 * Adds multiple Typesystem references to this Document.
+	 */
+	void referenceTypesystems(const std::vector<Handle<Typesystem>> &d)
+	{
+		invalidate();
+		typesystems.insert(typesystems.end(), d.begin(), d.end());
+	}
+
+
+	/**
 	 * Returns true if and only if the given StructureNode is part of this
 	 * document, meaning that there is a path of parent references in the
 	 * Structure Tree leading from the given StructureNode to this Document.
@@ -1034,4 +1055,4 @@ extern const Rtti Anchor;
 }
 }
 
-#endif /* _OUSIA_MODEL_DOCUMENT_HPP_ */
-\ No newline at end of file
+#endif /* _OUSIA_MODEL_DOCUMENT_HPP_ */
diff --git a/src/plugins/xml/XmlOutput.cpp b/src/plugins/xml/XmlOutput.cpp
index 68edc0e..e1f1c31 100644
--- a/src/plugins/xml/XmlOutput.cpp
+++ b/src/plugins/xml/XmlOutput.cpp
@@ -44,7 +44,7 @@ void XmlTransformer::writeXml(Handle<Document> doc, std::ostream &out,
 	    transformStructuredEntity(document, doc->getRoot(), logger, pretty);
 	document->addChild(root);
 	// then serialize.
-	document->serialize(out, "<?xml version=\"1.0\"?>", pretty);
+	document->serialize(out, "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>", pretty);
 }
 
 Rooted<Element> XmlTransformer::transformStructuredEntity(