https://github.com/awsdocs/amazon-eventbridge-user-guide/blob/master/doc_source/filtering-examples-structure.md

The json is missing some elements -- looks truncated -- causing it to be rendered poorly.

There is some additional whitespace in the Simple Matching with Event Patterns section as well, specifically in the instance ID value.

as stated in the docs it should be possible to filter on nested fields:

https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-event-patterns.html (value matching)

1. Sample Event

{
  "version": "0",
  "id": "4cb1378f-3e1a-1c32-f5d9-832b2fd53d8a",
  "detail-type": "SomeEventType",
  "source": "some.source",
  "account": "111",
  "time": "2022-05-16T08:29:16Z",
  "region": "eu-central-1",
  "resources": [],
  "detail": {
    "attributes": {
      "some_attribute": {
        // ...
      }
    }
  }
}

2. Event-Filter

{
  "detail": {
    "attributes": {
      "some_attribute": [{
        "exists": true
      }]
    }
  }
}

The Test Tool always says:

Sample event did not match the event pattern.

Hi, there! I happened to be browsing AWS' documentation about Event Bridge transformations, and I noticed what appears to be an incorrect example. The input template example labeled "Amazon CloudWatch log group" shows output that is invalid JSON. The output has an unclosed string and the resultant object is closed by a right parenthesis ()) instead of a right brace (}). Furthermore, the output contains unescaped double quotes around the instance ID. I just want to bring this possible mistake to your attention or verify whether this is the correct/intended output.

The line in question can be found here:

The page in AWS's documentation can be found here:

https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-transform-target-input.html#eb-transform-input-examples

There is a typo in this sentence:

"EventBridge delivers a stream of real-time data from your own applications, Software-as-a-Service (SaaS) applications, and AWS services and routes that data to targets such as AWS Lambda."

https://github.com/awsdocs/amazon-eventbridge-user-guide/blob/master/doc_source/what-is-amazon-eventbridge.md

I'm not sure of the intended meaning so I can't raise a PR to fix it.

I see that #11 was closed recently, but the error still exists in the documentation, just in a different file then what was linked in the original issue (looks like mv was made in 4ddcc77)

Current documentation:
https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-monitoring.html#eb-metrics-dimensions

In addition to the MetricName: EventBusName getting published for non default event buses, an undocumented MetricName: Events, and Dimension: EventSourceName are published for partner event source buses.

$ aws cloudwatch list-metrics --namespace "AWS/Events"
{
    "Metrics": [
        ... other metrics ...,
        {
            "Namespace": "AWS/Events",
            "MetricName": "Events",
            "Dimensions": [
                {
                    "Name": "EventSourceName",
                    "Value": "aws.partner/opsgenie.com/<id>"
                }
            ]
        },
        {
            "Namespace": "AWS/Events",
            "MetricName": "Invocations",
            "Dimensions": [
                {
                    "Name": "EventBusName",
                    "Value": "aws.partner/opsgenie.com/<id>"
                },
                {
                    "Name": "RuleName",
                    "Value": "opsgenie-to-some-target"
                }
            ]
        },
        {
            "Namespace": "AWS/Events",
            "MetricName": "Invocations",
            "Dimensions": [
                {
                    "Name": "EventBusName",
                    "Value": "my-custom-bus"
                },
                {
                    "Name": "RuleName",
                    "Value": "custom-to-some-target"
                }
            ]
        },
        {
            "Namespace": "AWS/Events",
            "MetricName": "Invocations",
            "Dimensions": []
        },
       {
            "Namespace": "AWS/Events",
            "MetricName": "Invocations",
            "Dimensions": [
                {
                    "Name": "RuleName",
                    "Value": "default-to-some-target"
                }
            ]
        },
       ... other metrics ...,
    ]
}

https://github.com/awsdocs/amazon-eventbridge-user-guide/blob/master/doc_source/eventbridge-monitoring-cloudwatch-metrics.md

I believe a Dimension of "EventBusName" is published on many (if not all) of the CloudWatch Metrics listed on the above page when the rule is added to the non-default event bus.

I looked at the doc but I can't seem to find the specification of the event payload received when using a cron rule.

The README is not very useful as it stands.

At least point to the index in doc_source so that people can browse the docs right away