Final answer:
The data mining problem without a specific target is referred to as unsupervised learning.
Step-by-step explanation:
When there is no specific target, the data mining problem is referred to as unsupervised learning.
In unsupervised learning, the goal is to identify patterns or relationships in the data without the use of a specific target variable. This can be useful in exploratory data analysis or when trying to discover hidden patterns or groupings in the data.