diff --git a/li.strolch.model/src/main/java/li/strolch/model/builder/params/StringListParamBuilder.java b/li.strolch.model/src/main/java/li/strolch/model/builder/params/StringListParamBuilder.java
index 0e3860863..a0dea0628 100644
--- a/li.strolch.model/src/main/java/li/strolch/model/builder/params/StringListParamBuilder.java
+++ b/li.strolch.model/src/main/java/li/strolch/model/builder/params/StringListParamBuilder.java
@@ -1,5 +1,7 @@
 package li.strolch.model.builder.params;
 
+import static li.strolch.model.StrolchModelConstants.*;
+
 import java.util.List;
 
 import li.strolch.model.builder.BagBuilder;
@@ -13,6 +15,24 @@ public class StringListParamBuilder<T extends ParameterBagContainerBuilder<T>>
 		super(builder, id, name);
 	}
 
+	public StringListParamBuilder<T> resourceRef(String type) {
+		this.interpretation = INTERPRETATION_RESOURCE_REF;
+		this.uom = type;
+		return this;
+	}
+
+	public StringListParamBuilder<T> orderRef(String type) {
+		this.interpretation = INTERPRETATION_ORDER_REF;
+		this.uom = type;
+		return this;
+	}
+
+	public StringListParamBuilder<T> activityRef(String type) {
+		this.interpretation = INTERPRETATION_ACTIVITY_REF;
+		this.uom = type;
+		return this;
+	}
+
 	@Override
 	public StringListParameter build() {
 		return build(new StringListParameter());
diff --git a/li.strolch.model/src/main/java/li/strolch/model/builder/params/StringParamBuilder.java b/li.strolch.model/src/main/java/li/strolch/model/builder/params/StringParamBuilder.java
index 4610f38ba..ea708edef 100644
--- a/li.strolch.model/src/main/java/li/strolch/model/builder/params/StringParamBuilder.java
+++ b/li.strolch.model/src/main/java/li/strolch/model/builder/params/StringParamBuilder.java
@@ -1,5 +1,7 @@
 package li.strolch.model.builder.params;
 
+import static li.strolch.model.StrolchModelConstants.*;
+
 import li.strolch.model.builder.BagBuilder;
 import li.strolch.model.builder.ParameterBagContainerBuilder;
 import li.strolch.model.parameter.StringParameter;
@@ -11,6 +13,24 @@ public class StringParamBuilder<T extends ParameterBagContainerBuilder<T>>
 		super(builder, id, name);
 	}
 
+	public StringParamBuilder<T> resourceRef(String type) {
+		this.interpretation = INTERPRETATION_RESOURCE_REF;
+		this.uom = type;
+		return this;
+	}
+
+	public StringParamBuilder<T> orderRef(String type) {
+		this.interpretation = INTERPRETATION_ORDER_REF;
+		this.uom = type;
+		return this;
+	}
+
+	public StringParamBuilder<T> activityRef(String type) {
+		this.interpretation = INTERPRETATION_ACTIVITY_REF;
+		this.uom = type;
+		return this;
+	}
+
 	@Override
 	public StringParameter build() {
 		return build(new StringParameter());