diff -r 91cb012d779a -r 3de41719d7eb src/Configuration.h
--- a/src/Configuration.h	Sun May 31 16:56:07 2020 +0200
+++ b/src/Configuration.h	Sun May 31 21:20:24 2020 +0200
@@ -64,15 +64,6 @@
 	std::vector<Parameter> parameters;
 };
 
-enum class KeepFile {
-	/** The file will be kept even if it was created during this transformation, so all the input data will stay on the disk. */
-	Always,
-	/** The file will be deleted at the end of this transformation – even if the file already existed. This is potentially dangerous, because we can unintentionally delete a database file. */
-	Never,
-	/** The file will be kept only if it was already present before the transformation. */
-	Automatic
-};
-
 /**
  * Allows copying relations from the input stream to the output stream.
  * Such relations are specified by a regular expression.
@@ -96,17 +87,9 @@
 public:
 
 
-	/**
-	 * By default, this transformation runs in-memory.
-	 * If 'file' is not empty, this transformation will operate on an .sqlite file.
-	 * The file will be created if it does not exist.
-	 */
-	relpipe::writer::string_t file;
-
-	/**
-	 * see KeepFile documentation
-	 */
-	KeepFile keepFile = KeepFile::Automatic;
+	relpipe::writer::string_t dataSourceName;
+	
+	relpipe::writer::string_t dataSourceURL;
 
 	std::vector<Statement> statements;