Library - unsorted

Data reference, annotation: Data annotation notes and tools · Knowledge representation / Semantic annotation / structured data / linked data on the web Reference: Open science, research, access, data, etc. · Citations Library related: Library glossary · Identifiers, classifiers, and other codes · Repository notes · Metadata models and standards Library systems · Online (library) search related · Library-related service notes · OpenURL notes · OCLC Pica notes · Library - unsorted

✎ This article/section is a stub — some half-sorted notes, not necessarily checked, not necessarily correct. Feel free to ignore, or tell me about it.

Semi-sorted

On what various common identifiers really are, and what that means to mapping between them

✎ This article/section is a stub — some half-sorted notes, not necessarily checked, not necessarily correct. Feel free to ignore, or tell me about it.

MARC field 035 (Local System Number) will often store a (bracketed) string identifier to disambiguate the type of identifier stored there, including:

• OCoLC for OCLC numbers
• DLC for Library of Congress
• ...and many others MARC codes for organizations code/name search

You might for example see 035 $a(OCoLC)ocm69983298

When OCLC numbers are used in the MARC field 001(verify), they are prefixed using:

• ocm for eight-digit numbers (≤99999999)
• ocn for nine-digit numbers (≥100000000)

PyZ3950

✎ This article/section is a stub — some half-sorted notes, not necessarily checked, not necessarily correct. Feel free to ignore, or tell me about it.

Installation

You need the python PLY package or you will get ImportError: No module named lex. Also as of this writing, ubuntu's python-ply package seems to be broken, but since the modules are pure python, manually unpacking lex.py and yacc.py from the download (into the z3950 directory in your site-packages, for example) also works.

The 2.04 tarball has a bug in the install scripts that causes it to raise:

AttributeError: 'float' object has no attribute 'replace'

This seems to mean the version in vers.py should be a string, not a float.

Docs & notes

• the ZOOM interface's pydoc documentation

How to deal with slow/timeouting connects?

Documentation example:

from PyZ3950 import zoom
conn = zoom.Connection('z3950.loc.gov', 7090)
conn.databaseName          = 'VOYAGER'
conn.preferredRecordSyntax = 'USMARC'

# for example with CCL (there are other options)
query = zoom.Query('CCL', 'ti="this and that"')
results = conn.search(query)

for result in results:
    print result

conn.close()