JSON and XML Data Formats

Start with the formats

Begin with JSON Overview for an introduction to JSON as a data interchange format. It also points to data interfaces, structures and specifications. Follow it with JSON, which shows how data is represented in name/value pairs and how curly brackets are used for an object.

For XML, open XML & XML Schema. The map introduces XML as a way to describe data and covers root elements, child elements and nesting. Comparing these maps gives you a starting point for studying how each format represents data.

Explore XPath and data exchange

The XPath mind map focuses on ways to select parts of a document. Its examples include a period for the current node, a double period for the parent node and an at sign for attributes. Use it after the XML map to connect those selections with the elements you have seen.

Existing Data Exchanges places JSON and XML alongside other exchange methods and related ideas, including arrays, keys and values. Data Exchange Methods/Systems looks at how JSON and XML are presented, as well as table features such as rows, columns and cells.

Use maps to check your understanding

There are no quizzes listed on this page, but you can turn a map's branches into questions. For example, ask yourself what an XPath symbol selects, then check your answer against the map. A quiz you create can help you revisit the same ideas alongside the maps.

JSON and XML Data Formats is one section of the ETL, Data Integration and Data Interchange unit in Databases and data science. Use the maps here to focus on this section before returning to the unit. Choose a map and follow a branch that interests you.