Changed TUIs as optional.
Change-Id: I4423494a923fdcf0320736025b107062ef4fc692
diff --git a/misc/payloads.md b/misc/payloads.md
index 97369c4..cff284f 100644
--- a/misc/payloads.md
+++ b/misc/payloads.md
@@ -96,11 +96,9 @@
character offsets of relations with element parts
are also stored in integer.
-Left-part TUI, right-part TUI, and relation TUI are also stored in
-payloads. Relation TUIs are only necessary, in case an attribute
-refers to it. It is necessary to have different length in payloads
-for each of the following relations, so that the start and the end
-ositions of the left and right parts can be determined.
+Left-part TUI, right-part TUI, and relation TUI can be optionally stored in
+payloads. A TUI is only necessary when an attribute refers to it, for example
+to match a relation span with a specific attribute.
1) Term to term relation has