Noise Words
CloudNine™ LAW and CloudNine™ Explore come with a predefined list of noise words that are skipped (excluded) while indexing case information. The noise word list includes the most common words in the English language (and, but, is, if, the) that you would generally not search for. Eliminating these words from the index ensures that searches run faster and more efficiently.
Noise words are processed as "any word" wild cards (*). For example the search "Harold the cat" is processed as: Harold * cat.
A single word search request for a noise word will return no records. For example, a search request for the term "because" yields no results.
The noise words for both CloudNine™ LAW and CloudNine™ Explore are stored in the noise.dat file.
Noise words can be managed at both the application and case level. By default, the noise word list is managed at the application level. The application-level noise.dat file is located in the DTConfig folder, which can be found in the installation path of CloudNine™ LAW.
You can also manage noise words for CloudNine™ Explore at the case level by selecting the Use case-specific noise words list (noise.dat) check box on the Indexer tab in the Edit Case Settings dialog box for a case. The first time the check box is selected for a case, the application-level noise.dat file in the DTConfig folder is copied to a case's $IndexHome directory (...\cases\[caseName]\$EDA\$IndexHome), and can be edited from the Indexer tab. When the check box is selected, the case-level noise.dat file will be used by the case. When the check box is not selected, the application-level noise.dat file will be used for the case. For more information see Indexer Case Settings.
|
Once the Use case-specific noise words list (noise.dat) check box is selected for a case and the noise.dat file is added to the case's $IndexHome directory, if the check box is cleared and then later reselected, the case-level noise.dat file is not overwritten by the application-level noise.dat list. The application-level noise.dat list is only copied to a case's $IndexHome directory the first time the Use case-specific noise words list (noise.dat) check box is selected for a case. |
Editing Application-level Noise Words
1.Navigate to the DTConfig folder located in the CloudNine™ LAW installation directory.
i.The default directory is: C:\ProgramData\CloudNine\EdAnalyzer\Home.
2.Open the noise.dat file using Notepad or another text editor.
3.Add or remove noise words from the list.
|
Removal of noise words from the noise.dat file can result in reduced performance of indexing and search operations. This is because any word removed from the noise list is indexed along with other keywords. |
4.Save the file.
5.In CloudNine™ Explore, rebuild each case's index. For more information, see Managing Indexes.
Editing Case-level Noise Words
When the Use case-specific noise words list (noise.dat) check box is selected for a case on the Indexer tab in the Edit Case Settings dialog box, the case will use the case-level noise.dat file in the case's $IndexHome directory (...\cases\[caseName]\$EDA\$IndexHome). When you change the Use case-specific noise words list (noise.dat) check box and/or edit the case's case-level noise.dat file, you will need to rebuild the case's index.
The Use case-specific noise words list (noise.dat) check box can only be selected for a case once the case is created. The check box is disabled on the Indexer tab in the New Case Settings dialog box when a case is being created.
1.In CloudNine™ Explore, click the Case Manager tab.
2.Select the case for which you want to use and/or edit the case-level noise.dat file, and then click Edit Selected Case.
i.If the case is already open in CloudNine™ Explore, you can select Case Settings from the Tools (wrench) drop-down located in the upper-right corner. The Edit Case Settings dialog opens.
3.Click the Indexer tab.
4.Select the Use case-specific noise words list (noise.dat) check box.
i.When the Use-case-specific noise words list (noise.dat) check box is selected, the Open link is displayed next to (noise.dat).
5.Click the Open link.
i.If your computer does not know which program to use to open the noise.dat file, the Window can't open this file message is displayed.
6.Open the noise.dat file using Notepad or another text editor.
7.Add or remove noise words from the list.
|
Removal of noise words from the noise.dat file can result in reduced performance of indexing and search operations. This is because any word removed from the noise list is indexed along with other keywords. |
8.Save and close the noise.dat file.
9.In the Edit Case Settings dialog box, click OK to save your changes.
10.In CloudNine™ Explore, rebuild the case's index. For more information, see Managing Indexes.