<if> for conditional processing.

<for> for looping based on simple counts.

<foreach> for looping through a set of nodes. This can be simple iterative loops or loops can be processed concurrently.

<while> for looping as long as a condition is true.

<break> to forcibly stop looping statements.

<try> to catch and handle potential exceptions from statements within the <try> block.

<throw> to forceably stop mashup processing and throw an exception as the mashup result.

<return> to forceably stop mashup processing and return the current value of <output> .

Database Mashable Transactions using <presto:beginTransaction>, <presto:commitTransaction> and <presto:rollbackTransaction>.

SQL Transactions using <sqlBeginTransaction>, <sqlCommit> and <sqlRollback>.