My understanding that nutch "Generate" job filters all available URLs in a
Nutch database by two criteria:
1. fetchTime + fetchInterval should be less than current time.
2. Number selected URLs for "Fetch" job should be less than -topN parameter
value. Value for "score" field from the database is used for this selection.
During crawling I can see only two values for the "score" field. Value 1 is
always set during "Inject" job, value 0 is always set during "Parse" job.
Looking on the code I see that OPICscoring plugin is used to define these
Is my understanding correct? How can be defined "score" value different then
0 or 1?