# Wildcards

You can specify wildcards in topic names. For each actual topic, the server uses logical AND to combine all the selectors that match the topic.

Note: However, routing of topic messages is only reliably supported when the subscriber's topic is a subset (or equal) of the configured global topic. Similarly, intersections are not supported. For example, if topics.conf contains `foo.*` and `foo.a*`, the following subscriptions are correct:

    foo.*
    foo.1
    bar.a.b

The following subscriptions are not correct:

    foo.>
    bar.*.b

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