Additionally, BLA architecture supports recursive composition by reference, facilitating hierarchicalassembly of BLAs and individual deployed artifacts.
此外，BLA体系结构支持按引用的递归组合，从而促进BLA和各个所部署构件的层次结构组装。
2
The classification and the description of the assembly features are researched and the feature models of the parts are built in CAXA, and the parts are assembled to hierarchicalassembly model.
The input and output steps of the assembly have a distinguished role: They transform relational data into hierarchical data and hierarchical data back to relational data, respectively.