diff --git a/inc/qcbor/qcbor_decode.h b/inc/qcbor/qcbor_decode.h
index 14b8f15..918d162 100644
--- a/inc/qcbor/qcbor_decode.h
+++ b/inc/qcbor/qcbor_decode.h
@@ -1101,7 +1101,7 @@
  * in the QCBORItem.
  *
  * Tags nest. Here the tag with index 0 has the data item as its content. The
- *  tag with index 1 has the tag at index 0 has its content and so forth.
+ * tag with index 1 has the tag at index 0 has its content and so forth.
  *
  * Deep tag nesting is rare so this implementation imposes a limit of
  * @ref QCBOR_MAX_TAGS_PER_ITEM on nesting and returns @ref
diff --git a/inc/qcbor/qcbor_encode.h b/inc/qcbor/qcbor_encode.h
index daea469..83c167e 100644
--- a/inc/qcbor/qcbor_encode.h
+++ b/inc/qcbor/qcbor_encode.h
@@ -1800,15 +1800,20 @@
  * @param[in] pMe    The encode context.
  * @param[in] uNum   The simple value.
  *
- * Use QCBOREncode_AddBool(), QCBOREncode_AddUndef()... instead of this.
+ * QCBOREncode_AddBool(), QCBOREncode_AddUndef() and
+ * QCBOREncode_AddNull() are preferred to this for the simple values
+ * defined in RFC 8949, but this can be used for them too.
  *
- * Use this to add simple values beyond those in defined RFC
- * 8949. Simple values must be registered with IANA. There is no range
- * of values for proprietary use.
+ * The main purpose of this is to add simple values beyond those in
+ * defined RFC 8949. Note that simple values must be registered with
+ * IANA. Those in the range of 0 to 19 must be standardized.  Those in
+ * the range of 32 to 255 do not require a standard, but must be
+ * publically specified. There is no range of values for proprietary
+ * use. See
  * https://www.iana.org/assignments/cbor-simple-values/cbor-simple-values.xhtml
  */
 static void
-QCBOREncode_AddSimple(QCBOREncodeContext *pMe, const uint64_t uNum);
+QCBOREncode_AddSimple(QCBOREncodeContext *pMe, const uint8_t uNum);
 
 static void
 QCBOREncode_AddSimpleToMap(QCBOREncodeContext *pMe,
@@ -3751,7 +3756,7 @@
 
 
 static inline void
-QCBOREncode_AddSimple(QCBOREncodeContext *pMe, const uint64_t uNum)
+QCBOREncode_AddSimple(QCBOREncodeContext *pMe, const uint8_t uNum)
 {
    /* This check often is optimized out because uNum is known at compile time. */
 #ifndef QCBOR_DISABLE_ENCODE_USAGE_GUARDS
@@ -3766,8 +3771,8 @@
 
 static inline void
 QCBOREncode_AddSimpleToMap(QCBOREncodeContext *pMe,
-                                   const char         *szLabel,
-                                   const uint8_t       uSimple)
+                           const char         *szLabel,
+                           const uint8_t       uSimple)
 {
    QCBOREncode_AddSZString(pMe, szLabel);
    QCBOREncode_AddSimple(pMe, uSimple);
@@ -3775,8 +3780,8 @@
 
 static inline void
 QCBOREncode_AddSimpleToMapN(QCBOREncodeContext *pMe,
-                                    const int64_t       nLabel,
-                                    const uint8_t       uSimple)
+                            const int64_t       nLabel,
+                            const uint8_t       uSimple)
 {
    QCBOREncode_AddInt64(pMe, nLabel);
    QCBOREncode_AddSimple(pMe, uSimple);
diff --git a/inc/qcbor/qcbor_spiffy_decode.h b/inc/qcbor/qcbor_spiffy_decode.h
index eb46210..9e0cd07 100644
--- a/inc/qcbor/qcbor_spiffy_decode.h
+++ b/inc/qcbor/qcbor_spiffy_decode.h
@@ -1170,6 +1170,37 @@
 
 
 /**
+ * @brief Decode the next item as a CBOR simple value.
+ *
+ * @param[in] pCtx            The decode context.
+ * @param[out] puSimpleValue  The simplle value returned.
+ *
+ * The purpose of this is to get a CBOR simple value other than a
+ * Boolean, NULL or "undefined", but this works on all simple
+ * values. See QCBOREncode_AddSimple() for more details on simple
+ * values in general.
+ *
+ * See QCBORDecode_GetBool(), QCBORDecode_GetNull(),
+ * QCBORDecode_GetUndefined() for the preferred way of getting those
+ * simple values.
+ */
+void
+QCBORDecode_GetSimple(QCBORDecodeContext *pCtx, uint8_t *puSimpleValue);
+
+void
+QCBORDecode_GetSimpleInMapN(QCBORDecodeContext *pCtx,
+                            int64_t             nLabel,
+                            uint8_t            *puSimpleValue);
+
+void
+QCBORDecode_GetSimpleInMapSZ(QCBORDecodeContext *pCtx,
+                             const char         *szLabel,
+                             uint8_t            *puSimpleValue);
+
+
+
+
+/**
  * @brief Decode the next item as a date string.
  *
  * @param[in] pCtx             The decode context.
@@ -2586,6 +2617,7 @@
 }
 
 
+
 static inline void
 QCBORDecode_GetDateString(QCBORDecodeContext *pMe,
                           const uint8_t       uTagRequirement,