In the following example, assuming Stock stock has a symbol XYZ. The contents

Buy XYZ

is added to the file. You can run the response with its default values using the following syntax:

WHEN 2 stock THEN FileOutputDemo with Contents="Buy ${symbol}", mode="append"

In this DRQL,

FileOutputDemo

is the name of the response.

The following example shows how to create and add the symbol, price, volume, and the last trading time of a stock to a file:

WHEN 1 stock THEN FileOutputDemo with file="/stocks/${symbol}.txt", contents="At closing time ${lastTradeTime}, the price of Stock ${symbol} was ${price} and volume was ${volume}", mode="append"