text: from django.db import models
  
  
  # classification value objects
  CHOICES_CLASSIFICATION = [
  	(0, 'unrelated'),
  	(1, 'simple'),
  	(2, 'complex'),
  	(3, 'substring'),
  ]
  
  
  class Abbreviation(models.Model):
  	long_form = models.TextField(blank=False)
  	abbreviation = models.CharField(max_length=100, blank=False)
  	classification = models.IntegerField(choices=CHOICES_CLASSIFICATION, null=True)
  