The algorithms also check properties of objects that are higher in the object hierarchy, checking up the chain of parents to the top object.
规则同样会检查对象层级结构中上层对象的熟悉，检查顶级对象与父类的连锁关系。
2
This includes removing any mineral deposits around the seat beneath the valve. Also check that the pull chain attached to the valve is not too short and holding the valve slightly open.
Boot the nodes in the compute group and check their status, as shown in Listing 23, where the nodeset command updates the nodetype, bootparams, and chain tables.