View source for CEN Data Browsing

==Discussion==
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<p>
As of March 31, 2020, the U.S. Census AFF (American Fact Finder) site is no longer offered by the Bureau.  This means that there is no longer a tool at the Census site to browse for data in a repeatable manner, and therefore dataZoa cannot use its typical dz-Dot method for drag-and-drop data access to the data that was served served by AFF.
Essentially, the traditional human pathways to the AFF data no longer exist.  There are human-oriented search tools at the Census that will use their API to navigate and find data <i>values</i> for you, but they do not provide the <i>locations</i> of the values such that you can revisit the same data. 
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<p>
<div class="imgGlyph24 imgHowTo"></div> To keep this valuable information available and current in dataZoa, there is a tool at dataZoa.com that lets you browse that data and then commit it (and its location!) to your dataZoa account so that it can stay up to date and grow over time, in the manner of all other dataZoa sources.
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== <b>Data Comparison Columns</b> section ==
<p>
When all of parameters are selected, you do a trial data fetch and examine the results.  You can tweak parameters if needed and re-fetch. When you are satisfied that the trial fetch is right for the data series, you can <b><i>Accept the Parameters and Commit to dataZoa</i></b>.
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<p>
The three data comparison columns show:
<ul>
<li>The legacy <b>Current data</b> for this Series as stored at dataZoa.  </li>
<li>
  The proposed <b>Trial data</b> for this Series as it will be fetched with the current parameters. 
  <ul>
  <li><div><div class="imgGlyph24 imgIdea"></div> Hover over the <b>Current URL</b> row to see the raw legacy data path.</div></li>
  <li><div><div class="imgGlyph24 imgIdea"></div> Hover over the <b>Current Title</b> row to see the full description of the legacy data.</div></li>
  </ul>
</li>
<li>An optional <b>Raw Fetch</b> direct from the data source, with minimal processing, to help resolve any subtleties about the data as stored at the source.</li>
</ul>
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