+<?php
+
+namespace Wikimedia\Rdbms;
+
+/**
+ * An object representing a master or replica DB position in a replicated setup.
+ *
+ * The implementation details of this opaque type are up to the database subclass.
+ */
+interface DBMasterPos {
+ /**
+ * @return float UNIX timestamp
+ * @since 1.25
+ */
+ public function asOfTime();
+
+ /**
+ * @param DBMasterPos $pos
+ * @return bool Whether this position is at or higher than $pos
+ * @since 1.27
+ */
+ public function hasReached( DBMasterPos $pos );
+
+ /**
+ * @param DBMasterPos $pos
+ * @return bool Whether this position appears to be for the same channel as another
+ * @since 1.27
+ */
+ public function channelsMatch( DBMasterPos $pos );
+
+ /**
+ * @return string
+ * @since 1.27
+ */
+ public function __toString();
+}