# Event Fields Comparison Table

The event fields used by [agents](https://hackmd.io/Uj-tC7l9Q82VyGr8R5PL2Q#ctxagentseventStoresearchrequest) ```ctx.agents.eventStore.emit()``` and ```search()/searchWithPattern()``` are different. Here we provide a convenient comparison table for you when it comes to searching events.

| Field | Emit Events | Search Events |
|:------------ |:---------------:|:-----------------------------:|
| Source DID | ```sourceDID``` | ```source_digital_identity``` |
| Target DID | ```targetDID``` | ```target_digital_identity``` |
| Label Name | ```labelName``` | ```label_name``` |
| Execution ID | N/A | ```execution_id``` |
| Task ID | N/A | ```task_id``` |

For example, if you feel like searching events with the source DID of ```ABC```, instead of putting "sourceDID" in the search field, you are supposed to use "source_digital_identity".

Below we are using this example in JavaScript to make you better understand how this comparison table works:

- Emit an event: we are creating an event whose source DID is ```ABC```.

ctx.agents.eventStore.emit([
    {
      sourceDID: "ABC",  // source DID
      targetDID: "XYZ",  // target DID will be user's name
      labelName: "Test",  // event label (greeting message)
      meta: "NA",  // include user's age in the meta field
      type: "default",  // default group
    },
  ]);

- Search the event: we are querying those events whose source DID is ```ABC```.

async function run(ctx) {

    // event search parameters
    // we are using this rather than "sourceDID", the one we used in emitting an event
    const searchReq = {
        queries: [
            {
                Match: {
                    field: "source_digital_identity", 
                    value: "ABC",
                },
            },
        ],
        excludes: [],
        filters: [],
        from: 0,
        size: 1000,
        sorts: [],
    };

    // search events that match and extract event objects
    const search = await ctx.agents.eventStore.search(searchReq);
    const events = search?.events;

Based on these examples, it would be easy to apply the same rule to other items - all you need to do is to follow the the comparison table above.

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###### tags: `LOC Studio` `LOC CLI`