character limit on column 'attrib_type.code'.

they are.

  Type 75 (GeneNo_RNA_pseu):  Missing a tab character.

  Type 131 (vega_export_mode):  Type code changed to 'vega_export_mod'
  to conform to 15 character limit of column attrib_type.code.

from the list of tables to process.

  Remove hard-coded external_db_id 11000.

  Change xref.info_type from 'MISC' to 'COORDINATE_OVERLAP'.

The UCSC external_db_id is now in external_db table, so delete hardcoded
external_db_id '11000'.

Change xref.info_type from 'MISC' to 'COORDINATE_OVERLAP'.

commit.

#
# Title: Add new info_type to xref table
#
# Description:
# Add the ENUM 'COORDINATE_OVERLAP' to the xref.info_type column.

slowest method, about 100 times slower than the most basic 'count'
binning method, but it now only uses 0.5 seconds to bin 2360 repeat
features into 100 bins instead of 6-9 seconds...

release document:  Make sure that the regular expression doesn't match
too much.

inefficiently implemented.

added _register_chained_special for projection to the same coord system. Only accessed vis project_to_slice

  Returns an array of bins, each bin containing the fraction of the bin
  that is coverage by any feature.

The current implementation is correct but inefficient.

  Returns an array of bins, each bin containing the sum of the fractions
  of features overlapping that bin.  A feature fully inside a bin will
  contribute 1 to the sum while a feature spanning exactly three bins
  (from the very start of the first to the very end of the third) will
  contribute 1/3 to the sum of each bin.