A device determines an additional component added to a second model, and a modification component modified in a third model, wherein a condition includes a wild card, and a first model are described in a module, the first model serving as a model when the module is applied to a model satisfying the condition and including a variable in which a string in a model satisfying the condition is stored, and the third model is a model when the module is applied to the second model satisfying the condition and where a string in the second model, which corresponds to the wild card, is stored in a variable, based on a word in a fourth model, and a word in the additional component and the modification component, calculates a degree regarding numbers of the word in the third model and the fourth, and creates a tag corresponding to the module.