In this chapter, we will cover the following topics:

• Using external IDs and namespaces
• Loading data using XML files
• Using the noupdate and forcecreate flags
• Loading data using CSV files
• Loading data using YAML files
• Addons updates and data migration

In order not to have to repeat a lot of code, we'll make use of the models defined in Chapter 5, Application Models. So, in order to follow the examples, grab this chapter's code.