Meaning of Transaction-Broker

What is a Transaction Broker with regard to selling and buying real estate?  Colorado Real Estate Commission Form DD 25-5-09 states:

“A transaction-broker assists the buyer or seller or both throughout a real estate transaction by performing terms of any written or oral agreement, fully informing the parties, presenting all offers and assisting the parties with any contracts, including the closing of the transaction without being an agent or advocate for any of the parties.  A transaction-broker must use reasonable skill and care in the performance of any oral or written agreement, and must make the same disclosures as agents about all adverse material facts actually known by the transaction-broker concerning a property or a buyer’s financial ability to perform the terms of a transaction and, if a residential property, whether the buyer intends to occupy the property. No written agreement is required.”

Realtor, Equal Housing, MLS