From the 2015 BJCP Cider guidelines:
C2B. Cider with Other Fruit This is a cider with other fruits or fruit-juices added – for example, berry. This is the correct style to enter a beverage fermented from a combination of apple and pear juice.
Overall Impression: Like a white wine with complex flavors. The apple character must marry with the added fruit so that neither one dominates the other. Aroma/Flavor: The cider character must be present and must fit with the other fruits. It is a fault if the added fruit(s) completely dominate; a judge might ask, Would this be different if neutral spirits replaced the cider? A fruit cider should not be like an alco-pop. Oxidation is a fault.
Appearance: Clear to brilliant. Color appropriate to added fruit, but should not show oxidation characteristics. (For example, red berries should give red-to-purple color, not orange.) Mouthfeel: Substantial. May be significantly tannic, depending on fruit added. Entry Instructions: Entrants MUST specify carbonation level (3 levels). Entrants MUST specify sweetness (5 categories). Entrants MUST specify all fruit(s) and/or fruit juice(s) added.