update

docs/source/sections/TCGA_on_ISBCGC.rst

@@ -90,6 +90,27 @@ TCGA Data at the DCC
 
 *Documentation in progress*
 
+Complete sets of open-access and controlled-access data archives were copied from the DCC on October 4th, 2015
+into Google Cloud Storage.
+
+Note that for every archive at the DCC, there may be multiple revisions of an archive.  A list of the current 
+"latest archives" at the DCC can be obtained 
+`here <http://tcga-data.nci.nih.gov/datareports/resources/latestarchive>`_.
+The archive `naming convention <https://wiki.nci.nih.gov/display/TCGA/TCGA+Data+Archives#TCGADataArchives-NamingConventions>`_
+includes the disease code, the platform/pipeline name, the archive type (*eg* data level), the serial index
+(which is often the batch number), and the revision number.
+If you want to check whether there is a newer version of a specific archive at the DCC than what we currently
+have on the ISB-CGC platform, you can check the date column in the latest archive report mentioned above,
+or you could compare the archive name to these lists of 
+`open-access archives <https://raw.githubusercontent.com/isb-cgc/readthedocs/master/docs/include/DCC_archives.04oct2015.open.tsv>`_
+and 
+`controlled-access archives <https://raw.githubusercontent.com/isb-cgc/readthedocs/master/docs/include/DCC_archives.04oct2015.cntl.tsv>`_
+based on our most recent upload.
+
+Note that all "bio" archives (containing clinical and biospecimen XML files) were recently migrated to a new
+XSD which is not backwards compatible with the previous XSD.  This update took place over the course of the 
+month of December 2015 and  none of these new archives are included in any of the current ISB-CGC BigQuery tables or files in GCS.
+
 TCGA Data at CGHub
 ==================
 
@@ -102,4 +123,3 @@ and the size of the file in bytes.
 
 The latest complete CGHub manifest can be 
 `downloaded directly from CGHub <https://cghub.ucsc.edu/reports/SUMMARY_STATS/LATEST_MANIFEST.tsv>`_ (67 MB).
-