Macros are useful for scheduled automatic downloads of files with
URLs that change regularly.
For example, a weather site has an image that updates daily. Its URL
has a day number inside. Thus, http://www.weather.com/image5.png
corresponds to the 5th day of the current month, while
http://www.weather.com/image12.png corresponds to the 12th day of the current month.
In this case, the following URL macro is useful:
http://www.weather.com/image{:day}.png
When Offline Explorer starts downloading the Project, it substitutes macros
with their values. Macro should start with the {: symbol and end with the } symbol.
Macros also allow you to download sequences of URLs. For example:
http://www.weather.com/image{:1..100}.png
This results in the following URLs download:
http://www.weather.com/image1.png
http://www.weather.com/image2.png
...
http://www.weather.com/image99.png
http://www.weather.com/image100.png