Data Item _item_units_conversion.from_code
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General 
- Item name
- _item_units_conversion.from_code
- Category name
- item_units_conversion
- Attribute name
- from_code
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
The unit system on which the conversion operation is applied
to produce the unit system specified in _item_units_conversion.to_code.
<to_code> = <from_code> <operator> <factor>
Data Type 
- Data type code
- code
- Data type detail
- A single word
- Primitive data type code
- char
- Regular expression
- [^\t\n "]*
