====== Data Resource - Virtual Columns ======


===== Virtual =====
''virtual columns'' are [[column|columns]] where their values are computed.

===== Howto =====
<related pattern="howto:*" />
===== Syntax =====

''Tabulify'' permits to add virtual columns that contains [[attribute|data resource attribute]] such as the [[name|name]] of a file with:
  * the [[docs:op:enrich|enrich operation]]
  * or the ''virtual-column'' [[docs:tabli:option|tabli option]].


==== tabli ====
The [[docs:tabli:option|tabli option]] syntax is the following:
<code>
--virtual-column "virtualColumnName=resourceAttributeName "
</code>
where:
  * ''virtualColumnName'' is the name of the column added
  * ''resourceAttributeName'' is the name of [[docs:resource:attribute|resource attribute]].