Default Node locking, also on label change? Or just on property creation/update?

[ad_van_ommen]

Documentation in Java Reference 5.3 is clear enough:

• When adding, changing or removing a property on a node or relationship a write lock will be taken on the specific node or relationship.
• When creating or deleting a node a write lock will be taken for the specific node.
• When creating or deleting a relationship a write lock will be taken on the specific relationship and both its nodes.

Is a label considered a node property as well?

• Does adding, changing or removing a label cause taking a write lock?
• Does adding, changing or removing a relationship type cause taking a write lock?

[brant_boehmann]

Yes, adding/removing labels requires a write lock on the node.
Relationship types cannot be added changed or removed from a relationship. A relationship can only have one type and it cannot change. (Though you could have multiple relationships between 2 nodes with different types). Relationship types aren't the same as node labels.

[ad_van_ommen]

I would suggest updating the documentation to include

• When adding, changing or removing a label on a node a write lock will be taken on the specific node.