How to add multiple attachments in Service catalog if we take variable type as attachment

[M Somasekhar]

 I am working on Catalog development as I know The attachment variable has a limitation in that, it only accepts a single attachment. If I want to attach multiple attachments then how should I achieve that?

[NikolasP1]

You should try to use the (native) attachment under Portal Settings of the catalog item. 

This accepts multiple files, but it comes as-is, meaning you can't add a label to it nor some toolkit explanatory text.