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Analyzing the MGE Database Linkage on Microstation Graphic Elements pds数据与图形文件就是通过db linkage连接到一起的 文件中详细讲解了 如何连接 以及dgn数据从大端 vax 数据转换为小端 pc 数据
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Analyzing the MGE Database Linkage
on Microstation Graphic Elements
On occasion you may be unable to use Feature/Attribute Manager within MGMAP to determine the
feature and attribute tables for graphic elements. When this occurs, key in anal or select Element >
Information and then select the graphic element. Scroll the vertical bar until you see the database
linkages in the dialog box.
The linkages can be represented in a 4 word format (DMRS) or 8 word format (RIS, Informix,
Oracle, ...). The 4 word format contains the entity number in the 2nd word and the mslink in the 3rd
word and high order byte of the 4th word. See Figure 1. The 8 word format contains the entity number
in the 4th word and the mslink in the 5th and 6th words. See Figures 2 and 3.
The database linkages are represented as hexadecimal numbers and must be converted to decimal prior to
using the numbers to perform RIS sql queries on the database. This can be accomplished using a
scientific calculator. See Figure 4.
4 Word Format for Database Linkage
Figure 1
DMRS Linkage Example
1
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