I have one question regarding ListagentKey and ListagentMLSID

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I have one question regarding ListagentKey and ListagentMLSID. What is the main difference between these two fields or how can I identify which is a ListagentKey and ListagentMLSID when I have been provided with a property metadata. For example I have two fields from the metadata called L_ListAgent1 and LA1_AgentID which contains data with numbers and alpha numeric characters. My question is how can I successfully identify an Agentkey and AgentMLSID from above given metadata?

Property L_ListAgent1 is a foreign key into the Agent U_AgentID field. The naming can be a little confusing. The issue is that once fields get published with a particular name, it is difficult to change it later because so many downstream users are affected by the change.

We have tried to capture these relationships in the metadata under section: METADATA-FOREIGN_KEYS.