<session>2044502273</session>
</init>
+ping
+
+Keeps a session alive. An idle session will time out after one minute. The
+ping command can be used to keep the session alive absent other activity. It
+is suggested that any browser client have a simple alarm handler which
+sends a ping every 50 seconds or so once a session has been initialized.
+
+Example:
+
+search.pz?command=ping&session=2044502273
+
+Response example:
+
+<ping>
+ <status>OK</status>
+</ping>
+
search
Launches a search, parameters:
session
start -- 0-indexed!!
num -- default=20
+block -- 0 or 1
+
+If block is set, the command will hang until there are records ready
+to display. Use this to show first records rapidly without requiring rapid
+polling.
Example: