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Text to go in the release notes:
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Adds a new option, `--embed_see_also_from_headings`, to the `misc/export_records.pl` script.
This will include any authority record see-also-from headings in the export for any bibliographic record 6xx fields, where the authority record has a 5xx.
Example:
1. A bibliographic record has a 650 - SUBJECT ADDED ENTRY--TOPICAL TERM:
. 650$a = Perl (Computer program language)
. 650$9 = 19
2. The authority record (Perl (Computer program language)) has a 550 - SEE ALSO FROM TRACING--TOPICAL TERM:
. 550$a = Scripting languages (Computer science)
. 550$w = g
3. With the `--embed_see_also_from_headings` option added to `misc/export_records.pl` you get the authority record's 550 information in the export:
```
<datafield tag="650" ind1="z" ind2=" ">
<subfield code="a">Scripting languages (Computer science)</subfield>
<subfield code="w">g</subfield>
</datafield>
```
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