1、An ASDL document contains a list of available LSIDs and their corresponding data and metadata locations.
2、一个ASDL文档包括一个可用的LSID及相应数据和元数据位置的列表。
3、In addition, with the maturity of ADSL technology, direct use of PON as terminal access equipment in FTTH is not so popular as ASDL applications.
