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7 changes: 7 additions & 0 deletions sdk-integration/sdk-2.x-docs/ID-standard
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# GrowingIO SDK 2.x 标识符规范

GrowingIO系统中:track接口的eventId,page.set接口的key,evar.set接口的key,people.set接口的key,以及以上这些接口JSON对象参数中的key-value pair的key称为标识符。对于这些标识符,GrowingIO SDK要求符合以下规则:
标识符不允许空字符串,不允许null
标识符的长度限制在50个英文字符之内
标识符仅允许大小写英文、数字、下划线、以及英文冒号,并且不能以数字和冒号开头
SDK在数据发送是检测到标识符如果不符合上述规则,将通过log的方式警告工程师,提示标识符不合法。