znode status

[蔡观洋 caiguanyang]

Hi,

the status of znode contains:
// information shared with the client
    class Stat {
        long czxid;      // created zxid
        long mzxid;      // last modified zxid
        long ctime;      // created
        long mtime;      // last modified
        int version;     // version
        int cversion;    // child version
        int aversion;    // acl version
        long ephemeralOwner; // owner id if ephemeral, 0 otw
        int dataLength;  //length of the data in the node
        int numChildren; //number of children of this node
        long pzxid;      // last modified children
    }
so what's the function of field "pzxid" and "cversion"?

Thanks!