diff --git a/interface/other b/interface/other
index 78ebbc3c8..64b09422d 100644
--- a/interface/other
+++ b/interface/other
@@ -1,7 +1,16 @@
 Source
+	compilation: Compilation
+	hash: Byte*
+	api: SourceAPI
+
+SourceAPI
 	packages : Package*
 	definitions: Definition*
 
+Compilation
+	startTime: Long
+	target: String
+
 Package
 	name: String
 
diff --git a/interface/src/main/java/xsbti/AnalysisCallback.java b/interface/src/main/java/xsbti/AnalysisCallback.java
index d3eb2ab54..efca555c4 100644
--- a/interface/src/main/java/xsbti/AnalysisCallback.java
+++ b/interface/src/main/java/xsbti/AnalysisCallback.java
@@ -23,5 +23,5 @@ public interface AnalysisCallback
 	/** Called after the source at the given location has been processed. */
 	public void endSource(File sourcePath);
 	/** Called when the public API of a source file is extracted. */
-	public void api(File sourceFile, xsbti.api.Source source);
+	public void api(File sourceFile, xsbti.api.SourceAPI source);
 }
\ No newline at end of file
diff --git a/interface/src/test/scala/TestCallback.scala b/interface/src/test/scala/TestCallback.scala
index d554a9a08..c49e11317 100644
--- a/interface/src/test/scala/TestCallback.scala
+++ b/interface/src/test/scala/TestCallback.scala
@@ -10,7 +10,7 @@ class TestCallback extends AnalysisCallback
 	val sourceDependencies = new ArrayBuffer[(File, File)]
 	val binaryDependencies = new ArrayBuffer[(File, String, File)]
 	val products = new ArrayBuffer[(File, File)]
-	val apis = new ArrayBuffer[(File, xsbti.api.Source)]
+	val apis = new ArrayBuffer[(File, xsbti.api.SourceAPI)]
 
 	def beginSource(source: File) { beganSources += source }
 
@@ -19,5 +19,5 @@ class TestCallback extends AnalysisCallback
 	def generatedClass(source: File, module: File) { products += ((source, module)) }
 	def endSource(source: File) { endedSources += source }
 
-	def api(source: File, sourceAPI: xsbti.api.Source) { apis += ((source, sourceAPI)) }
+	def api(source: File, sourceAPI: xsbti.api.SourceAPI) { apis += ((source, sourceAPI)) }
 }
\ No newline at end of file