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[ddlm-group] LOOP versus LIST
- To: Group finalising DDLm and associated dictionaries <ddlm-group@iucr.org>
- Subject: [ddlm-group] LOOP versus LIST
- From: Joe Krahn <krahn@niehs.nih.gov>
- Date: Tue, 05 Jan 2010 12:41:16 -0500
I assume that a list of items defined via a loop is distinct from a list of items defined by a list. Is that correct? Likewise, is a list of one item distinct from a scalar value? Currently, CIF files don't differentiate between a one-element loop and a scalar. For example, RCSB components.cif does not use loops for atom data when there is only one atom. Is this stated anywhere? Also, is an empty string a valid TABLE index? Other CIF names require at least one character, but my understanding is that a TABLE index is any valid string, which includes an empty string. Strings are also case-sensitive, so I assume that TABLE indices are also case-sensitive. Thanks, Joe Krahn _______________________________________________ ddlm-group mailing list ddlm-group@iucr.org http://scripts.iucr.org/mailman/listinfo/ddlm-group
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