As far as I understand there should be upload_any docs feature in the metadata response. I'm looking forward to using upload_any feature.
Actually I don't have such feature:
<?xml version="1.0" encoding="UTF-8" ?>
<updated>2011-05-11T20:03:45.469Z</updated>
<title>Document List User Metadata</title>
<author>
<name>l.kwull.l</name>
</author>
<gd:quotaBytesTotal>22548578304</gd:quotaBytesTotal>
<docs:quotaBytesUsedInTrash>663746</docs:quotaBytesUsedInTrash>
<docs:importFormat source="text/plain" target="document" />
<docs:importFormat source="application/x-vnd.oasis.opendocument.spreadsheet" target="spreadsheet" />
<docs:importFormat source="application/msword" target="document" />
<docs:importFormat source="application/vnd.oasis.opendocument.text" target="document" />
<docs:importFormat source="application/vnd.sun.xml.writer" target="document" />
<docs:importFormat source="application/vnd.ms-excel" target="spreadsheet" />
<docs:importFormat source="image/bmp" target="document" />
<docs:importFormat source="application/pdf" target="document" />
<docs:importFormat source="application/rtf" target="document" />
<docs:importFormat source="text/csv" target="spreadsheet" />
<docs:importFormat source="application/x-msmetafile" target="drawing" />
<docs:importFormat source="application/vnd.ms-powerpoint" target="presentation" />
<docs:importFormat source="text/html" target="document" />
<docs:importFormat source="image/gif" target="document" />
<docs:importFormat source="image/jpeg" target="document" />
<docs:importFormat source="text/tab-separated-values" target="spreadsheet" />
<docs:importFormat source="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" target="spreadsheet" />
<docs:importFormat source="application/vnd.openxmlformats-officedocument.wordprocessingml.document" target="document" />
<docs:importFormat source="image/png" target="document" />
<docs:exportFormat source="drawing" target="application/pdf" />
<docs:exportFormat source="presentation" target="application/pdf" />
<docs:exportFormat source="document" target="text/plain" />
<docs:exportFormat source="presentation" target="application/vnd.ms-powerpoint" />
<docs:exportFormat source="spreadsheet" target="application/x-vnd.oasis.opendocument.spreadsheet" />
<docs:exportFormat source="presentation" target="text/plain" />
<docs:exportFormat source="document" target="text/html" />
<docs:exportFormat source="document" target="application/rtf" />
<docs:exportFormat source="document" target="text/rtf" />
<docs:exportFormat source="drawing" target="image/svg+xml" />
<docs:exportFormat source="drawing" target="image/png" />
<docs:exportFormat source="drawing" target="image/jpeg" />
<docs:exportFormat source="spreadsheet" target="application/pdf" />
<docs:exportFormat source="document" target="application/pdf" />
<docs:exportFormat source="document" target="application/vnd.oasis.opendocument.text" />
<docs:exportFormat source="document" target="application/msword" />
<docs:exportFormat source="spreadsheet" target="application/vnd.ms-excel" />
<docs:feature>
<docs:featureName>ocr</docs:featureName>
</docs:feature>
<docs:feature>
<docs:featureName>translation</docs:featureName>
<docs:featureRate>0.5</docs:featureRate>
</docs:feature>
<docs:maxUploadSize kind="document">512000</docs:maxUploadSize>
<docs:maxUploadSize kind="spreadsheet">1048576</docs:maxUploadSize>
<docs:maxUploadSize kind="presentation">10485760</docs:maxUploadSize>
<docs:maxUploadSize kind="drawing">2097152</docs:maxUploadSize>
<docs:maxUploadSize kind="pdf">1073741824</docs:maxUploadSize>
<docs:maxUploadSize kind="file">1073741824</docs:maxUploadSize>
</entry>