2. The computer program product of claim 1 , wherein using the extraction field template to identify the set of candidate prior blocks and the set of candidate post blocks comprises: searching the digital real estate document for a select token, wherein the select token is selected from a set of tokens associated with the specific field type and the set of tokens is from the extraction field template; identifying an example prior block or an example post block in the extraction field template that contains the select token; and adding the example prior block to the set of candidate prior blocks or adding the example post block to the set of candidate post blocks.
2. The computer program product of claim 1 , wherein using the extraction field template to identify the set of candidate prior blocks and the set of candidate post blocks comprises: searching the digital real estate document for a select token, wherein the select token is selected from a set of tokens associated with the specific field type and the set of tokens is from the extraction field template; identifying an example prior block or an example post block in the extraction field template that contains the select token; and adding the example prior block to the set of candidate prior blocks or adding the example post block to the set of candidate post blocks. 3. The computer program product of claim 2 , wherein the example prior block is used to identify in the digital real estate document a candidate prior block, and wherein the example post block is used to identify in the digital real estate document a candidate post block.