When the NLA uploads records they go through a match merge programme where records will match by number (local systen nos or LA control nos or LC control nos) or by title,(using the similarity algorithm. Then all records merge. If matched by number the NLA record will be the base record for the merge, but if matched by title the databse record will be the base record for the merge.
If two records are input on the same night then it depends on which file gets processed first.
All records merge. Some merge more than others. I don't like to use the word replace as I feel this gives the wrong idea
From Ian Dunn in Libraries Australia 20/8/2010
IMPORTING RECORDS
In voyager the only control we have over exporting records to Libraries Australia is the "OK to export" button. The "NLA replace .. etc" is only concerned with downloading records from Libraries Australia. This is done when the 019 matches . The "OCLC replace ...etc" downloads matching against tha 010 ie LC nos.. The replace settings have nothing to do with exporting records although the wording suggest this is the case.
HOW TO IMPORT A GOOD RECORD FROM LA
1. Find a good record on LA
2. Copy the 019 field from the LA record.
3. Paste the 019 into the not so good Voyager record.
4. Save the 019 onto the poor record
5. Now "save to db" the good record and it will replace the bad one.
ditto for the 010
HOW TO IMPORT A GOOD RECORD FROM LA
1. Find a good record on LA
2. Copy the 019 field from the LA record.
3. Paste the 019 into the not so good Voyager record.
4. Save the 019 onto the poor record
5. Now "save to db" the good record and it will replace the bad one.
ditto for the 010
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