Yes. And it's of indeterminate length, as it uses delegation.

For instance:

1.2.840.113556.4.2 : Microsoft word file format
1.2.840.113556.4   : Microsoft file formats
1.2.840.113556     : Microsoft
1.2.840            : United States
1.2                : ISO member
1                  : ISO assigned values

[download]

or

1.3.6.1.1.1.1.2 : gecos field
1.3.6.1.1.1.1   : nisSchema attributes
1.3.6.1.1.1     : nisSchema
1.3.6.1.1       : c=US Internet (X.500)
1.3.6.1         : Internet
1.3.6           : US DoD
1.3             : ISO organizations
1               : ISO assigned values

[download]

or

1.3.6.1.4.1.5923.1.1.1.2 : eduPersonNickname
1.3.6.1.4.1.5923.1.1.1   : ? eduPerson attributes ?
1.3.6.1.4.1.5923.1.1     : eduPerson
1.3.6.1.4.1.5923.1       : MACE related work
1.3.6.1.4.1.5923         : Internet2
1.3.6.1.4.1              : IANA registered private entities
1.3.6.1.4                : Internet Private
1.3.6.1                  : Internet
... (as above)

[download]

In reply to Re^2: a more efficient lexicographical sort? by jhourcle
in thread a more efficient lexicographical sort? by Anonymous Monk

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