The defines an attribute syntax for storing arbitrary string (and sometimes binary) data. ds-cfg-directory-string-attribute-syntax ds-cfg-attribute-syntax org.opends.server.schema.DirectoryStringSyntax Indicates whether zero-length (that is, an empty string) values are allowed. This is technically not allowed by the revised LDAPv3 specification, but some environments may require it for backward compatibility with servers that do allow it. false ds-cfg-allow-zero-length-values