in case with keywords,

 

california_oranges qty:50;

 

people can replace with,

 

california oranges - quantity:50,

 

and the computer should be able to

read it.

 

it doesn't have to be like code,

where it must exactly match.

 

rather, it would be user-oriented.

people may prefer one type of text

to the other. so it should focus on

their convenience with many options.