Morningstar secId computation or ISIN mapping?

Morningstar seem to have a particular identifier for stocks and funds, which is called a SecId.

The Morningstar® SecId is a 10 character alpha numeric code. Each
individual investment is assigned a SecId when it is added to the
Morningstar® Database.

Does someone knows how it is computed, or which algorithm it uses ? Can it be mapped or linked to a SEDOL, a CUSIP or an ISIN code?

Example :

The fund “Magellan C” has ISIN FR0000292278, but morningstar.co.uk maps this to SecId F0GBR04QCJ in the url.

http://www.morningstar.co.uk/uk/funds/snapshot/snapshot.aspx?id=F0GBR04QCJ

Thanks