http://www.onlineweather.com/v4/uk/climate/York.html http://www.onlineweather.com/v4/uk/climate/London.html http://www.onlineweather.com/v4/uk/climate/Cardiff.html http://www.onlineweather.com/v4/uk/climate/?????.html Show the URL for the first location. Ask pupils which part of the URL indicates the city. Ask pupils what the URL would be to collect data for London and Cardiff. Demonstrate they are correct by revealing the next two URLs. Show the last URL and explain that the name of the city is the only part of the URL which needs to be changed.

http://www.onlineweather.com/v4/uk/climate/?????.html [“city” “which city?”] http://www.onlineweather.com/v4 /uk/climate/ [“city” “which city?”].html Explain that in a web query, part of the URL can be replaced to allow the user to type in what is required. Show the text string they will use [“city” “which city?”] and explain that this will replace the name of the city in the URL. Show the full amended URL. Tell pupils that the syntax is very important because it will not work if they get it wrong: point out the square brackets, the speech marks, and the space between each part. Explain that when part of the URL is replaced with a text string the web query will wait for the user to type in the name of the city for which they want the data. Tell pupils you will now show them how to do this in a system.