How to create/add component in BCL

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Hi,

I would like to know how to add component into the BCL library. I created a group, but when I enter the Create content > Component page, I do not know what to enter and where. From what I understand, I need to fill the Attribute type and Value, but is there any guide/tutorial on how to fill those?

Also, if I create one wall in OpenStudio, I would like to export that wall only and upload it in the BCL library, but it seems that the only way I can export, is to export everything.

Thanks you