Layout Plus中的Footprint有什么规律

挑选了下面一些Footprint，不知道有什么规则？<br /><br />BLKCON.100/VH/TM1SQ/W.100/2<br />BLKCON.156/VH/TM1SQS/W.312/6<br />CONNRT4R80P<br />CPCYL1/D.200/LS.100/.031<br />CROP<br />DAX2/.400X.080/.028<br />DINC/MIN_SM/6/A<br />DSUB/RP.318/TM/15<br />JUMPER200<br />**<br />MOIRE<br />MTHOLE1<br />OSC84P<br />PLCC44<br />QUAD.025/132/WG1.085<br />QUAD.50M/144/WG22.00<br />QUAD.65M/160/WG30.00<br />SIMM.050/VS_RP/TM/72<br />SIP/TM/L.200/2<br />SIP/TM/L.900/9<br />SM/C_0805<br />SM/D_MLL41<br />SM/L_1812<br />SM/R_0805<br />SM/SOT23_123<br />SOG.025/48/WG.420/L.625<br />SOG.050/14/WG.244/L.350<br />SOG.050/16/WG.244/L.400<br />SOG.050/20/WG.350/L.550<br />SOG.050/20/WG.420/L.525<br />SOG.050/24/WG.420/L.625<br />SOG.050/44/WG.642/L1.150<br />SOJ.050/40/WB.400/L1.000<br />SOJ.050/40/WB.400/L1.050<br />SWITCH6<br />TO18