Topic filter wildcards

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 filter company/model/year/# may represent these topics: company/model/year/version or company/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 or country/company/industry/year/software/price.