Github user wgtmac commented on a diff in the pull request:
    --- Diff: site/specification/ ---
    @@ -0,0 +1,1032 @@
    +layout: page
    +title: Evolving Draft for ORC Specification v2
    +This specification is rapidly evolving and should only be used for
    +developers on the project.
    +# TO DO items
    +The list of things that we plan to change:
    +* Create a decimal representation with fixed scale using rle.
    +* Create a better float/double encoding that splits mantissa and
    +  exponent.
    +* Create a dictionary encoding for float, double, and decimal.
    +* Create RLEv3:
    +   * 64 and 128 bit variants
    +   * Zero suppression
    +   * Evaluate the rle subformats
    +* Group stripe data into stripelets to enable Async IO for reads.
    +* Reorder stripe data into (stripe metadata, index, dictionary, data)
    +* Stop sorting dictionaries and record the sort order separately in the 
    +* Remove use of RLEv1 and RLEv2.
    +* Remove non-utf8 bloom filter.
    +* Use numeric value for decimal bloom filter.
    --- End diff --
    We may also use numeric value for decimal column statistics


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