Expression pattern remodel

This is a proposal for changing the current ?Expr_pattern model in order to capture

• quantitative expression
• life_stage, cellular_compartment expression specificity

we will also take the opportunity to clean up some unused tags

‪*CDS: no objects‬ ‪*Sequence: 8 objects I could consolidate with other classes -e.g. clone‬ ‪*Pseudogene: no objects ‬ ‪*Protein: 1 object found by Paul d, should figure out from where it comes‬ from ‪*Cell: no objects ‬ ‪*Cell_group: no objects‬