Parent-Child Relationships

Google Issue Tracker supports parent-child relationships. A parent-child relationship is typically used to represent the breakdown of work within a given effort. A parent can have multiple children, and a child can have multiple parents.

The parent-child relationship has the following characteristics:

Characteristic Details
Relationship N:N
Ordering Ordering of children within a parent is supported.
Cycle detection Cyclic dependencies are prevented by the system.
Max direct children 500
Max ancestors 1000


The following graphic shows some sample parent-child relationships.

A graphic that shows some parent-child relationships

Parent-child relationships and blocking

The existing Blocking and Blocked by relationships are still supported when you use parent-child relationships. When you're combining parent-child relationships with blocking:

  • Use parent-child relationships to break down work into smaller units.
  • Use blocking/blocked by when timing and sequence are critical, and you want to provide clear indications in the UI to escalate stopped/not started work.

The following graphic shows examples of parent-child and blocking work breakdowns.

A graphic that shows examples of parent-child and blocking work breakdowns