
    Write a function that validates whether a medical record field identifier follows the hospital's standardized naming convention, which requires all field names to consist of lowercase letters connected by underscores. The function should return true if the field identifier meets this format requirement, and false if it contains any characters or patterns that deviate from the standard format.
    

    
import re

def text_lowercase_underscore(text):
    """
    Write a function that validates whether a medical record field identifier follows the hospital's standardized naming convention, which requires all field names to consist of lowercase letters connected by underscores. The function should return true if the field identifier meets this format requirement, and false if it contains any characters or patterns that deviate from the standard format.
    

    """
import re

def text_lowercase_underscore(text):
    """
    Write a function that validates whether a medical record field identifier follows the hospital's standardized naming convention, which requires all field names to consist of lowercase letters connected by underscores. The function should return true if the field identifier meets this format requirement, and false if it contains any characters or patterns that deviate from the standard format.
    

    """
    patterns = '^[a-z]+_[a-z]+$'
    if re.search(patterns, text):
        return True
    else:
        return False