Streaming checkpoint parameters

[jose.martin_santacruz.ext]

Hi,

We are testing Apache Griffin streaming, and we have several parameters 
(info.path, ready.time.interval, ready.time.delay, time.range, updatable) in 
checkpoint configuration that we do not know which is its function:

      "checkpoint": {
        "type": "json",
        "file.path": "hdfs:///griffin/streaming/dump/source",
        "info.path": "source",
        "ready.time.interval": "10s",
        "ready.time.delay": "0",
        "time.range": ["-5m", "0"],
        "updatable": true
      }
Does anybody know where we can find a description of these parameters?

Regards