Lucene .Net-创建比键/值更复杂的索引的好方法是什么?
我正在启动一个项目,在该项目中我们尝试使用 Lucene .Net 来索引 XML 文档的内容。在小文档中,我发现索引似乎只能包含具有单个字符串值的文件。我尝试索引的数据比简单的键值对稍微复杂一些。
这是我想要从中生成索引的 xml 文档的示例:
<descriptor>
<asset guid="2AA7C8F9-2CB1-4A81-9421-C09F1D85939E" generated-date="2011-07-30" generated-by="hw/AutoMfg" generated-with="PMS">
<!-- information about where the asset can be used -->
<target>
<localization>en-us</localization>
<localization>es-us</localization>
<environment>desktop</environment>
<environment>mobile</environment>
</target>
<!-- all contents of an asset must have the same version -->
<version-information>
<version-number source="content">9.1.123.4</version-number>
<version-number source="manufacturing">9.1.123.4</version-number>
<release-label>9.1</release-label>
</version-information>
<!-- catalog information about the primary role of the asset -->
<role>
<namespace>parent.type.family.some.thing</namespace>
<mime-type>text/html</mime-type>
<hwid>abc1234</hwid>
</role>
</asset>
</descriptor>
因此,我可以看到创建以“descriptor”的子元素命名的字段,但是其中的子节点又如何呢?如何对这些数据建立索引?我应该创建一个分隔字符串来表示每个字段的值吗?
例如 字段:“目标”值:“本地化:en-us;es-us 环境:桌面;移动 | ...
我是否需要像上面的示例一样展平数据以对其建立索引?
谢谢!
I'm starting a project in which we are trying to index the contents of XML documents with Lucene .Net. In the little documentation I have found it seems that indexes can only consist of fileds with a single string value. The data that I am attempting to index is slightly more complicated than simple key value pairs.
Here is an example of an xml document I would want to generate an index from:
<descriptor>
<asset guid="2AA7C8F9-2CB1-4A81-9421-C09F1D85939E" generated-date="2011-07-30" generated-by="hw/AutoMfg" generated-with="PMS">
<!-- information about where the asset can be used -->
<target>
<localization>en-us</localization>
<localization>es-us</localization>
<environment>desktop</environment>
<environment>mobile</environment>
</target>
<!-- all contents of an asset must have the same version -->
<version-information>
<version-number source="content">9.1.123.4</version-number>
<version-number source="manufacturing">9.1.123.4</version-number>
<release-label>9.1</release-label>
</version-information>
<!-- catalog information about the primary role of the asset -->
<role>
<namespace>parent.type.family.some.thing</namespace>
<mime-type>text/html</mime-type>
<hwid>abc1234</hwid>
</role>
</asset>
</descriptor>
So I could see create fields named after the child elements of 'descriptor' but what about the child nodes there within? How can this data be indexed? Should I create a delimited string to represent the values of each fields?
eg
field: "Target" Value:"localization: en-us;es-us environment: desktop;mobile | ...
Do I need to flatten my data out like in my example above to index it?
Thanks!
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给出具体的建议有点棘手——其中大部分内容都围绕着你想要检索的内容以及如何检索,而不是数据的形状。无论如何,我会从 Simone Chiaretta 在 lucene.net 上的精彩小系列开始(1 2 3 4 5)。一个很有帮助的概念是,您可以为给定文档多次索引同一字段,因此您可能会做出类似的事情:
Lucene 基本上是扁平的,但能够以新的、有趣的方式变得深入而扁平。
Kind of tricky to give specific advice -- so much of it revolves around what you want to retrieve and how rather than the shape of the data. In any case, I would start with Simone Chiaretta's excellent little series on lucene.net (1 2 3 4 5). One concept that will help alot is the fact that you can index the same field multiple times for a given document, so you'll probably make something like:
Lucene is fundamentally flat, but capable of being deep while being flat in new and interesting ways.
查看 Digester + Lucene。 Digester 的 .NET 端口是 NDigester
Take a look at Digester + Lucene. The .NET port of Digester is NDigester