i have created the attributes from the attribute manager. bu i can't see them inside objects. so i created another with the same name.
İd of my attribute is @5017@ and i want to select it with a catalog. searched the std and prj folder but no chance i can't finde AttrGroups file. i am using 2018 version. is it possible to make it?

I would recommend to create user attributes inside Allplan, not with the attribute manager.

But you have to asign every Attribute manualy to your objects

but can i assing the attribute values by katalog?

without any screenshots, or examples it is realy hard to understand your issues.
maybe i got you correct now :

predefined Values are written in the AttributeDefinitionCollectionLocal_XX.xml inside the std/xml folder. For Attributes with free values you will find a "attrib_XXX.asw" file inside the std/asw folder.
if you wish to asign ifc attributesets, you have to go to the project properties.

i've attached the screenshots. thank you for your help but i cannot manage to do it.

I think we had the same problem in another thread. maybe, the AttrGroups.xml files are in the German Version only...but you can try to copy the file I posted back then. the AttrGroups01.xml is for architecture elements, such as wall, column, slab...check the other thread, even if this one is in german.
I do not have an answer to your second question. i do not know if this is possible. But i like that idea!