关于一段代码的用处

[RecordIDField("BMS_IMPORT_ID"
,AliasName = "BMS_IMPORT_ID"
,DataType = DbType.Decimal
,Size = 18
,DisplayInCondition = false
,DisplayInMaintain = false
,ResourceKey = "BMS_IMPORT.BMS_IMPORT_ID.Text"
,AllowEdit = false
,SelectSequence = 0
,IsInsertField = false
,IsUpdateField = false
)]
public const String BMS_IMPORT_ID_FIELD = "BMS_IMPORT_ID";请问该段代码中[]中内容是做什么用的