can I've collections?

[sandrodz]

My site structure is complicated. I need to have several different collections. Is this possible?

[KyleAMathews]

Every page has access to all other pages. So wherever you want a collection, just add a React.js component there e.g. to create a photo gallery, /photos.js.

In Gatsby 0.8+ page data is at this.props.route.pages. For a photo gallery, you write a filter function which pulls out all the photo pages.