Parsing XML data in FileMaker Pro | FileMakerProGurus | Learning Claris FileMaker | Scoop.it
Getting data from web sources is the trend in FileMaker (and all other languages) these days.  

With the popularity and breadth of web services available to your clients, it's no wonder they need it.

For example, your client may be using a web store order consolidation service, one that brings in all their orders from Amazon, e-Bay, and other similar online stores (OK, it just so happens I have a client doing this...).  

The consolidation service is valuable, but it is a large company and suffers from the large company curse:   It's not easy for them to customize for individual customers, which opens a door for enterprising developers willing to learn.

So when a client wants to get data from, or send data to, the service, it's up to the developer to find a solution.  

That means you need to find ways to make FileMaker talk to the service.

One very popular way data is offered to clients by companies like this is XML.