Hello Ganesh
Just like (main) Characteristics, Attributes are Infoobjects as well. But these attributes are added as a part of (main)Characteristic Infoobjects. They provide additional details about the main characteristic. So when the master data is loaded into these (main) Characteristic infoobjects, you also need to load the required attribute data in it.
For Example :
PRODUCT is Characteristic having MATERIAL GROUP, BRAND and PRODUCT FAMILY as its attribute.
So when you will load the data into PRODUCT infoobject, you require to populate all its attributes as well. The record in the Product infooject will look like below.
Product#ABCD, MatGrp#GRP111, Brand111, ProdFamily111
Main Characteristics are added as Characteristic in MPOS.
Now regarding CVC creation, Yes.CVCs can be created based on Sales History data loaded in infocube. For creating CVCs, ONLY value for characteristics needs to be populated. Attribute values comes automatically based on the data from main characteristic.
As per above example, let us say for Product# ABCD CVCs are created, so values for all its attributes(like brand, mat. group, prod fmly) values will come based on the data in Product Infoobject.
As suggested by others, you need consult your local BI and APO team member.
Hope this answers your query.
Thank you
Satish Waghmare