为每个数据元素创建索引项。
索引项占用的磁盘页数目。
这样的索引项可以提供所有被请求的数据。
为前两项(标记上下文加上数据元素)的并置创建索引项。
An index entry is created for the concatenation of the two preceding items (tag context plus data element).
而索引项应当按顺序存储，否则其毫无用途。
The index entries, on the other hand, must be stored in order, otherwise the usability of the index is removed.
记录并删除mdc表的块索引中的块索引(BID)索引项。
Logs and removes the block index (BID) index entry from the MDC table's block indexes.
你可以除一个索引项和预设项数量外返回你想要的。
You can exclude a reference item and provide the number of items you want to return.
B -TreeScanner自动判断哪些索引项应该删除。
The B-Tree Scanner automatically determines which index items are to be deleted.
当数字列建立索引时，正是这个二进制表示用于索引项中。
It is this binary representation that is used in the index entry when a number column is indexed.
你可以利用反向索引轻松的找到那些文档包含了特定的索引项。
You can use an inverted index to easily find which documents contain certain terms.
如果被请求的列都包含在索引项中，则可以避免不得不读数据行的情况。
To avoid having to read the data rows, if the requested columns are all contained within the index entries
此索引项是没有用的，因为普通查询不会在其谓词中使用此类串联值。
This is not useful since queries would typical not use such concatenated values in their predicates.
如果Lucene在索引项信息文件中发现有索引项和搜索词相匹配。
If Lucene finds a term that matches the search word in the term information file, it will visit the list in the frequency file to find which documents contain the term.
为每个数据元素的所有完整标记上下文创建索引项—即，并置数据元素前的每个标记。
An index entry is created for each complete tag context for each data element — that is, the concatenation of every tag leading up to the data element.
缓冲池是内存中的一块存储区域，用于临时读入和更改数据库页(包含表行或索引项)。
A buffer pool is an area of storage in memory into which database pages (containing table rows or index entries) are temporarily read and changed.
虽然索引项是连续的，但是不保证包含相邻索引项的行将驻留在同一数据页上。
Although index entries are sequential, there is no guarantee that rows with adjacent index entries will reside on the same data pages.
通过推断决定索引项，并且根据XML文档中包含的这种自然模式来构建索引项。
Index entries are determined by inference and are built based on the natural patterns contained in XML documents. NeoCore XMS creates index entries according to the following rules.
B - TreeScanner线程会去掉删除的索引项并重新平衡索引节点。
The B-Tree Scanner threads remove deleted index entries and rebalance the index nodes.
直接建立维度表与事实表的位图连接索引会产生大量无用的索引项，影响查询效率。
Building bitmap join indexes of dimension tables and fact tables directly may bring a large number of useless index items that affect query efficiency.
相反，在正向索引中，文档占据了中心的位置，每个文档指向了一个它所包含的索引项的序列。
Each term points to a list of documents that contain it. On the contrary, in a forwarding index, documents take the center stage, and each document refers to a list of terms it contains.
这个文件包含了索引项在每个文档中出现的位置信息，你可以利用这些信息来参与对索引结果的排序。
This file contains the list of positions at which the term occurs within each document. You can use this information to rank the search results.
这是索引文件里面最核心的一个文件，它存储了所有的索引项的值以及相关信息，并且以索引项来排序。
This core index file stores all of the terms and related information in the index, sorted by term.
所以，可以提取关于在选择某种网格大小时在哪个网格层次上将生成多少索引项的信息，而不必真正创建和物化索引。
So you can extract the information how many index entries would be generated on which grid level if you choose certain grid sizes — without actually creating and materializing the index.
如果lastused列含有其默认值(LUM上的‘0001 - 01 - 01’，或主机上的NULL)，最好选择删除相关索引项。
If the LASTUSED column contains its default value (' 0001-01-01 'on LUW or NULL on the mainframe), the associated index is a good candidate for being dropped.
我希望它的索引项有这个功能就好了，就是不用一页一页的找，你也可以直接跳到“p”字母打头菜谱的那一页(比如，法式炖锅potaufeu)。
I wish the index had a feature that allowed you to skip down to, say, the "p" s (pot au feu, anyone?) without scrolling laboriously page by page.
在分析Lucene的索引文件结构之前，我们先要理解反向索引(Inverted index)这个概念，反向索引是一种以索引项为中心来组织文档的方式，每个索引项指向一个文档序列，这个序列中的文档都包含该索引项。
Before analyzing Lucene's index file structure, you should understand the inverted index concept. An inverted index is an inside-out arrangement of documents in which terms take center stage.
大多数关键字都有一个索引，显示词汇项及其相关术语是如何组织的。
Most keywords have an index that shows how lexical items and their related terms are organized.
如果对一个项目包含了一个以上的索引条目，则每一项都被编上了超链接号码（如下所示）。
If a book contains more than one index entry for a term, each occurrence in the book is indicated by a hyperlinked number (see below).
两者都有一个索引号58的目录项。
如果需要得到头字段键，可以向最后一个方法传递一个参数，这个参数表示在结果集中所感兴趣的项的索引。
Should you need to get the header field key, you could pass a parameter to the final method representing the index of the entry in the result set you were interested in.
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