clarification for duration conversions

Author: rsill-neo4j

modules/ROOT/pages/functions/temporal/format.adoc

@@ -381,12 +381,6 @@ The three occurrences of `p` add one space character of padding to the two digit
 [[query-functions-temporal-format-duration-types]]
 === Duration types
 
-Cypher's duration type `DURATION` has components and component groups, see xref:values-and-types/temporal.adoc#cypher-temporal-accessing-components-durations[components of durations].
-
-When constructing a string representation of a duration type with `format()`, components can only be converted within the component groups, for example, weeks to days since they are both in the component group "Days".
-This is because without a reference point, there is no way of determining the specifics of a duration.
-For example, not all months have the same number of days, and switches to or from daylight saving time means that a day has 23 or 25 hours rather than 24.
-
 Use the characters in table <<duration-character-table>> to create a string pattern for duration types.
 
 [#duration-character-table]
@@ -407,6 +401,11 @@ Use the characters in table <<duration-character-table>> to create a string patt
 |                 | N          | nanoseconds
 |===
 
+Cypher's duration type `DURATION` has components and component groups, see xref:values-and-types/temporal.adoc#cypher-temporal-accessing-components-durations[components of durations].
+If the string pattern contains a character from a component group but does not contain a character denoting a longer duration from the same group, `format()` converts the longer duration to the equivalent duration with the character that is present, for example a missing `y` (year) will be converted to four quarters, if `q` is present in the string pattern.
+This is because without a reference point, there is no way of determining the specifics of a duration.
+For example, not all months have the same number of days, and switches to or from daylight saving time means that a day has 23 or 25 hours rather than 24.
+
 .Duration formatting
 ======