diff -r 2b83302d595a -r fcd5d86c472f src/cx/properties.h
--- a/src/cx/properties.h	Sun Jan 12 13:04:32 2025 +0100
+++ b/src/cx/properties.h	Sun Jan 12 13:25:50 2025 +0100
@@ -616,6 +616,11 @@
  * the return value will be #CX_PROPERTIES_NO_ERROR.
  * When the source was consumed but no k/v-pairs were found, the return value
  * will be #CX_PROPERTIES_NO_DATA.
+ * In case the source data ends unexpectedly, the #CX_PROPERTIES_INCOMPLETE_DATA
+ * is returned. In that case you should call this function again with the same
+ * sink and either an updated source or the same source if the source is able to
+ * yield the missing data.
+ *
  * The other result codes apply, according to their description.
  *
  * @param prop the properties interface
@@ -626,6 +631,7 @@
  * @retval CX_PROPERTIES_READ_FAILED reading from the source failed
  * @retval CX_PROPERTIES_SINK_FAILED sinking the properties into the sink failed
  * @retval CX_PROPERTIES_NO_DATA the source did not provide any key/value pairs
+ * @retval CX_PROPERTIES_INCOMPLETE_DATA the source did not provide enough data
  * @retval CX_PROPERTIES_INVALID_EMPTY_KEY the properties data contains an illegal empty key
  * @retval CX_PROPERTIES_INVALID_MISSING_DELIMITER the properties data contains a line without delimiter
  * @retval CX_PROPERTIES_BUFFER_ALLOC_FAILED an internal allocation was necessary but failed