single word requests - What are the pieces used to fill in a template called?


If I have a template (say a generic letter) that is filled in with various pieces of data (say, the name of the addressee), what is a general term for those pieces of data?


For example:


Dear {firstname},
This is just a friendly reminder that the book {booktitle} will be due on {duedate}.
Thank you.

What would I refer to {firstname}, {booktitle} and {duedate} as?



Answer



You could refer to {firstname}, {booktitle} and {duedate} as placeholders or variables.


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