What does "ffspl" mean in a url-metrics result set?

[StevePoul]

So I've got this server-side JScript object I've declared which works nicely for us.

var mozObj = new MozInteraction()
.setMethod("GET")
.setHost("http://lsapi.seomoz.com")
.setPath("linkscape/url-metrics")
.setCols(parseInt("11111111111111111111111111111111111111111111111111111", 2))
.setLines(10)
.setAccessId(accessId)
.setSecret(secret)
.setExpires((new Date()).addDays(1).valueOf())
.generateSignature();

etc etc

The setCols call sets the Cols value to the maximum possible: 9007199254740991.

The weird thing is that in the JSON response I get a whole pile of column names that I can't find descriptions for in the documentation at https://moz.com/help/links-api/making-calls/response-fields

e.g.

ffspl1 ffspl2 ffspl3 ...  fuspl0 fuspl1 fuspl2 fuspl3 ...  pfspl0 pfspl1 pfspl2 pfspl3 ... puspl0 puspl1 puspl2 puspl3... etc

[effectdigital]

This is interesting. Most data suppliers will say if scripts break, that's down to the programmer's poor use of error-handling (if/except/fallback statements). It's nice to see that with Moz, there's a little more thought

[dave.kudera]

Hey Steve!

Those are older deprecated responses, they will return a value of '0'.  We left them available for calling so they don't break anyones existing script but they are not valid metrics.  You can see the full list of supported URL metrics here:

https://moz.com/help/links-api/making-calls/url-metrics

Hope that helps, let us know if you have further questions.