Which of the following is NOT one of the span attributes captured by Dynatrace?

In Dynatrace, span attributes are key-value pairs that help to provide context about the data being captured during the execution of distributed transactions. The attributes include specific information that can be used for monitoring and analyzing performance across different services and transactions.

The attributes such as "db.type" and "http.method" are standard attributes associated with database calls and HTTP requests, respectively. "db.type" specifies the type of database being accessed (e.g., MySQL, PostgreSQL), while "http.method" describes the HTTP method used for a particular request (e.g., GET, POST). "user_agent" is another important attribute that identifies the client software making the request, which is useful for understanding the types of clients interacting with your services.

"session_time," however, does not represent a standard span attribute captured by Dynatrace. It does not provide information relevant to the execution context of a specific span in distributed tracing. Instead, it may relate to metrics or other tracking methods concerning user sessions but is not included as a span attribute in the same way as the other listed attributes. Therefore, identifying "session_time" as not being one of the span attributes is accurate within the context of Dynatrace monitoring and data analytics.