Category:Step

Planning

• Task think
• Task buy food

Execution

• Task act
• Task prepare meal

The Steps in alphabetical sequence

• Category:Plan
• Category:Execute

The Steps in logical sequence (sortkey of category)

• Category:Plan
• Category:Execute

Nested Queries based on logical sequence

Note that the sequence of the elements within each subquery is based on its sortkey; for better readability we added a separation line between the category boundaries

• Task think
• Task buy food

• Task act
• Task prepare meal