DataCapture policy - case with capturing API path

[optimism]

Hi, All!

https://cloud.google.com/apigee/docs/api-platform/reference/policies/data-capture-policy?hl=en#uripa... 

https://cloud.google.com/apigee/docs/api-platform/reference/policies/data-capture-policy?hl=en

Given API path https://apigee-host/service/core/v1/configs/auth 

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<DataCapture name="DC-url-auth" continueOnError="false" enabled="true">
    <DisplayName>DC-url-auth</DisplayName>
    <IgnoreUnresolvedVariables>false</IgnoreUnresolvedVariables>
    <Capture>
        <Collect>
            <URIPath>
                <Pattern ignoreCase="false">/service/core/v1/configs/{$}</Pattern>
            </URIPath>
        </Collect>
        <DataCollector>dc_url_auth</DataCollector>
    </Capture>
</DataCapture>

Data Collector is a type of String.

I'm making GET API call to the above API path https://apigee-host/service/core/v1/configs/auth 

I anticipate that DataCapture writes API path to the DataCollector, but no values or null are being written. 

For example, https://cloud.google.com/apigee/docs/api-platform/reference/policies/data-capture-policy?hl=en#heade... - this case is OK, writes e.g. one of the request header content to the Data Collector.

https://cloud.google.com/apigee/docs/api-platform/reference/policies/data-capture-policy?hl=en#uripa... - this case writes nothing or null to the Data Collector - see my example above.

thanks, Optimism.