In addition to the predefined fields, you can add extra custom fields to the extension mappings by defining custom attributes on the mappings.
除了预定义的字段外，通过对映射定义定制属性，您还可以向扩展映射添加额外的定制字段。
2
Once you have a root name established, add on extrafields to specify vocabulary names and version numbers.
在建立了根名称之后，添加额外的字段来指定词汇表名称和版本号。
3
This requires either extrafields in the relational table to store Notes header information or a separate table that’s related to the data table with key fields. .