You can use the following wildcards in a topic filter to broaden the range of topics that it represents:
-
#
. Use this multi level wildcard to match the parent and any number of child topic levels. You can use it either on its own or after a level separator/
. It must be the last character in the path. For example, this topic filtercompany/model/year/#
may represent these topics:company/model/year/version
orcompany/model/year/user/price
. -
+
. Use this one-level wildcard to match a specific topic level. You can also use it at more than one topic level and together with the multi level wildcard. For example, this topic filter+/company/+/year/#
may represent these topics:network/company/campaign/year/version
orcountry/company/industry/year/software/price
.