For those who don't know, relations act as a bridge between two databases as shown here:

For this tutorial I'm going to briefly explain what is going on with parent/child relations (or relations that grab pages from inside the same database):

The basic use of parent/child properties is for task hierarchy inside a workflow, however, there are other uses for this feature. Here are just a few:

• Placing multiple "related" databases into a master database

• Incorporating column value into a formula

• Referencing sources in a research catalog

Below I'm going to walk through creating a task hierarchy …

Step 1

Create a database for a master list of tasks with the following properties:

• Tasks - Aa

• Tag - Multi-Select

• Child Tasks - Relation

Remember, for Child Tasks "use the same property."

Step 2

Click Child Tasks cell and select all sub tasks associated with parent task. In this case, I labeled my parent task with an "X."

It will look something like this:

→ Next, let's move "Call Furniture Delivery" into a sub task of "Rearrange Furniture.”

This is what a page will look like inside (with deadline included):

Step 3

Adjust database to view ONLY tasks with child tasks by using the filter function:

Select the following filter options:

• Child Tasks

• Is Not Empty

The final database view will look like this:

VIEW EXAMPLE