... NatSearch . ... It uses one input field to either jump to a topic or perform a query. ... if your input starts with an uppercase letter, NatSearch tries to find the named topic and jumps to it; you may enter the target topic using the web.topic notation . if your input starts with an uppercase letter but does not exist as a topic, a topic search tries to find it; if there is exactly one search hit, NatSearch jumps to it directly . ... a regular expression that must match a topic in the hit set . ...