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<td bgcolor="ffffff" width="15">&nbsp;</td><td bgcolor="ffffff" width="12">&nbsp;</td><td valign="top" align="left" bgcolor="ffffff" width="*">
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<td width="90%"><font size="4" face="Verdana, Arial, Helvetica"><b>表定義</b></font></td><td width="200" align="right"><font size="1" face="Verdana, Arial, Helvetica"><nobr>   第 10 頁（共15 頁）</nobr></font></td>
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<p>以下是 LiDO 模式工具為地址類生成的表模式。在查看描述之前先仔細研究它。</p>
<table border="1">
<tr>
<th width="150pt">Name</th><th width="150pt">Type</th><th width="150pt">Key</th>
</tr>
<tr>
<td width="150pt">LIDOID</td><td width="150pt">bigint(20)</td><td width="150pt">Yes</td>
</tr>
<tr>
<td width="150pt">ivAddressLine1</td><td width="150pt">varchar(255)</td><td width="150pt">No</td>
</tr>
<tr>
<td width="150pt">ivAddressLine2</td><td width="150pt">varchar(255)</td><td width="150pt">No</td>
</tr>
<tr>
<td width="150pt">ivCity</td><td width="150pt">varchar(255)</td><td width="150pt">No</td>
</tr>
<tr>
<td width="150pt">ivState</td><td width="150pt">varchar(255)</td><td width="150pt">No</td>
</tr>
<tr>
<td width="150pt">ivZip</td><td width="150pt">varchar(255)</td><td width="150pt">No</td>
</tr>
</table>
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</font><font size="2" face="Verdana, Arial, Helvetica">
<p>您首先會注意到，除一個列名以外，其它所有列名都與實例變量名相匹配。第一列 <code>LIDOID</code> 是工具添加的，因為我們在元數據中沒有定義有關對象的唯一性鍵。作為對象或應用程序程序員，是不可以訪問該字段的，盡管 LiDO 將使用該字段跟蹤實例。</p>
<p>表的創建不在 JDO 實現的范圍之內，所以您會發現不同工具使用不同機制、表名稱標準以及結果模式。</p>
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