10g Materialized View Using A Database Link

In Oracle 10gR2.If a materialized view uses a database link for the query in order to create a snapshot of data on a remote instance, does the name of the database link have to be an entry in the tnsnames.ora file?

The following link suggests not, but is not version specific: Materialized View - Oracle Wiki FAQ

However, the following 11g documentation suggests that the database link name must be the same as the global name of the target database.URL..
I can't any info specific to 10gR2.

We have three instances. Our application metadata is stored in a schema in B.METADATA. There is a shell schema (B.METADATASHLL) that provides access to the tables to remote applications.

On instance A, we have a shell schema (A.METADATASHLL) that creates materialized views as follows:
CREATE DATABASE LINK METADATA_PRIME
CONNECT TO metadatashll IDENTIFIED BY password
USING 'B';

Our materialized view is created using the query SELECT * FROM METADATA.APPLICATIONS@METADATA_PRIME WHERE Application = 'A';

The query works, but the materialized view does not.I'm being told that the database link has to be named B as follows

CREATE DATABASE LINK B
CONNECT TO metadatashll IDENTIFIED BY password
USING 'B';

Which means that I can only have one public link to instance B, and I'm in a pickle if I create a second application (which I have) using the same model).