Almost two months after the PCCLIST discussion on this topic, I was 
frustrated by problems controlling series statements in Connexion when 
they contain the 830 $x.  There is an error message that the $x is too 
long.  So I searched the OCLC-CAT archives and found a long post by Robert 
Bremer dated Aug. 21, 2009.   He wrote:  

"The addition of $x to 8xx series tracing fields in MARC 21 was made at 
the request of CONSER in support of the CONSER Standard Record policy. 
Under that serials cataloging policy, a 4xx series statement for a traced 
series would be omitted in favor of input of the 8xx series tracing 
only ... In monographic cataloging there is currently no policy in place 
to omit series statements. ... OCLC recommends that subfield $x in 8xx 
series tracing fields be omitted from master records in WorldCat when the 
same ISSN already appears in 490."

Hope this helps,

Amy

[log in to unmask]

On Fri, 4 Jun 2010 12:54:41 -0400, Amy Turner <[log in to unmask]> wrote:

>The documentation that I could find does not make an explicit and 
absolute statement on this, but from the sources cited below, I would 
infer that the 830 $x is optional for all types of cataloging.   And I 
certainly hope so, as I think that if the ISSN is needed for retrieval of 
individual series statements, it could be supplied from the authority 
record rather than from having the cataloger copy and paste multiple times.
>
>
>The BIBCO Standard Record Metadata Application Profile says about the 
series added entry "If cataloger judgment or local cataloging policy is to 
trace a series, include in this field the authorized form of the series as 
established in the LC Name Authority File."
>
>
>Cf: http://www.loc.gov/catdir/pcc/bibco/BSR_ImplementationDoc.pdf
>
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>OCLC Biblographic Formats and Standards say that the 830 $x is optional 
at both full and minimal levels.
>
>Cf: http://www.oclc.org/bibformats/en/8xx/830.shtm
>
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>From: Program for Cooperative Cataloging [mailto:[log in to unmask]] On 
Behalf Of Arakawa, Steven
>Sent: Friday, June 04, 2010 12:26 PM
>To: [log in to unmask]
>Subject: [PCCLIST] 830 $x
>
>For pcc records, is 830 $x mandatory if applicable if the series added 
entry is made? Is there some documentation I can refer to regarding the 
policy?
>
>Steven Arakawa
>Catalog Librarian for Training & Documentation
>Catalog & Metadata Services, SML, Yale University
>P.O. Box 208240 New Haven, CT 06520-8240
>(203)432-8286 [log in to unmask]
>
>