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diff --git a/libpoldiff/src/range_trans_internal.h b/libpoldiff/src/range_trans_internal.h
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+++ b/libpoldiff/src/range_trans_internal.h
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+/**
+ *  @file
+ *  Protected interface for range transition rule differences.
+ *
+ *  @author Jeremy A. Mowery jmowery@tresys.com
+ *  @author Jason Tang jtang@tresys.com
+ *
+ *  Copyright (C) 2007 Tresys Technology, LLC
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef POLDIFF_RANGE_TRANS_INTERNAL_H
+#define POLDIFF_RANGE_TRANS_INTERNAL_H
+
+#ifdef	__cplusplus
+extern "C"
+{
+#endif
+
+	typedef struct poldiff_range_trans_summary poldiff_range_trans_summary_t;
+
+/**
+ * Allocate and return a new poldiff_range_trans_summary_t object.
+ *
+ * @return A new range transition summary.  The caller must call
+ * range_trans_destroy() afterwards.  On error, return NULL and set
+ * errno.
+ */
+	poldiff_range_trans_summary_t *range_trans_create(void);
+
+/**
+ * Deallocate all space associated with a
+ * poldiff_range_trans_summary_t object, including the pointer itself.
+ * If the pointer is already NULL then do nothing.
+ *
+ * @param rts Reference to a range transition summary to destroy.  The
+ * pointer will be set to NULL afterwards.
+ */
+	void range_trans_destroy(poldiff_range_trans_summary_t ** rts);
+
+/**
+ * Reset the state of all range transition rule differences.
+ * @param diff The policy difference structure containing the differences
+ * to reset.
+ * @return 0 on success and < 0 on error; if the call fails,
+ * errno will be set and the user should call poldiff_destroy() on diff.
+ */
+	int range_trans_reset(poldiff_t * diff);
+
+/**
+ * Get a vector of all range transition rules from the given policy,
+ * sorted by source type.
+ *
+ * @param diff Policy diff error handler.
+ * @param policy The policy from which to get the items.
+ *
+ * @return A newly allocated vector of all range transition rules (of
+ * type pseudo_range_trans_t).  The caller is responsible for calling
+ * apol_vector_destroy() afterwards.  On error, return NULL and set
+ * errno.
+ */
+	apol_vector_t *range_trans_get_items(poldiff_t * diff, const apol_policy_t * policy);
+
+/**
+ * Compare two pseudo_range_trans_t objects, determining if they have
+ * the same source type, target type, and target class or not.
+ *
+ * @param x The range transition from the original policy.
+ * @param y The range transition from the modified policy.
+ * @param diff The policy difference structure associated with both
+ * policies.
+ *
+ * @return < 0, 0, or > 0 if x is respectively less than, equal to, or
+ * greater than source role of y.
+ */
+	int range_trans_comp(const void *x, const void *y, const poldiff_t * diff);
+
+/**
+ * Create, initialize, and insert a new semantic difference entry for
+ * a range transition rule.
+ *
+ * @param diff The policy difference structure to which to add the entry.
+ * @param form The form of the difference.
+ * @param item Item for which the entry is being created.
+ *
+ * @return 0 on success and < 0 on error; if the call fails, set errno
+ * and leave the policy difference structure unchanged.
+ */
+	int range_trans_new_diff(poldiff_t * diff, poldiff_form_e form, const void *item);
+
+/**
+ * Compute the semantic difference of two range transition rules for
+ * which the compare callback returns 0.  If a difference is found
+ * then allocate, initialize, and insert a new semantic difference
+ * entry for that range transition rule.
+ *
+ * @param diff The policy difference structure associated with both
+ * rules and to which to add an entry if needed.
+ * @param x The range transition rule from the original policy.
+ * @param y The range transition rule from the modified policy.
+ *
+ * @return 0 on success and < 0 on error; if the call fails, set errno
+ * and leave the policy difference structure unchanged.
+ */
+	int range_trans_deep_diff(poldiff_t * diff, const void *x, const void *y);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif				       /* POLDIFF_RANGE_TRANS_INTERNAL_H */