Finding a topic
(→String similarity) |
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== Find == | == Find == | ||
| − | Addition to Finder tab, topics can be searched selecting '''Edit > | + | Addition to Finder tab, topics can be searched selecting '''Edit > Search...''' or pressing CTRL-F in Wandora. Option opens Search and query dialog window as shown below |
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| − | Writing a word to search field and pressing OK starts search. Search word is interpreted as a [http://java.sun.com/docs/books/tutorial/essential/regex/ regular expression] allowing rather complicated searches. Search results are viewed | + | Writing a word to search field and pressing OK starts search. Search word is interpreted as a [http://java.sun.com/docs/books/tutorial/essential/regex/ regular expression] allowing rather complicated searches. Search results are viewed below the search field as shown below: |
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| − | To open any topic in the search results double click topic name or right click topic name and select option '''Open topic | + | To open any topic in the search results double click topic name or right click topic name and select option '''Open topic'''. Addition to regular expression searches Wandora features also string similarity search. |
===String similarity=== | ===String similarity=== | ||
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'''Difference instead similarity''' option changes the similarity measure to a difference measure. If selected, Wandora searches for strings that are maximally different compared to given string. | '''Difference instead similarity''' option changes the similarity measure to a difference measure. If selected, Wandora searches for strings that are maximally different compared to given string. | ||
| − | Wandora views similarity search results | + | Wandora views similarity search results below the search settings. To open any topic in the search results Wandora user can double click a topic name in the results dialog. |
=== Query scripts=== | === Query scripts=== | ||
Revision as of 14:30, 17 February 2015
Finder is used to locate and open topics. Finder locates beside the Topics tab as shown above.
Finder is a simple free text search. Finder tries to locate given search word in topics. You can search with any topic element or element combination. Search result appears below the search field. Double clicking a topic in the search result opens the topic into the topic panel. Right clicking a topic opens context menu with a large number of topic tools.
Search words used in Finder can contain Java specific regular expression characters such as dot. Finder doesn't restrict search word lenght. As an extreme example you could start search with a single dot and the search would result every topic in Wandora. Viewing very large result sets is time consuming and may cause OutOfMemoryExceptions in Wandora. This is especially true when you are accessing database topic maps.
Find
Addition to Finder tab, topics can be searched selecting Edit > Search... or pressing CTRL-F in Wandora. Option opens Search and query dialog window as shown below
Writing a word to search field and pressing OK starts search. Search word is interpreted as a regular expression allowing rather complicated searches. Search results are viewed below the search field as shown below:
To open any topic in the search results double click topic name or right click topic name and select option Open topic. Addition to regular expression searches Wandora features also string similarity search.
String similarity
String similarity tab is used to perform similarity searches to the topic map. String similarity allows Wandora user to search topics with strings that only resemble matched string. Wandora uses Sam Chapman's SimMetrics open source library to calculate string similarities. Below is a screen capture of Wandora's String similarity tab.
Available similarity types are
- Levenshtein distance
- Needleman-Wunch distance
- Smith-Waterman distance
- Block distance
- Monge Elkan distance
- Jaro distance
- Jaro Winkler
- SoundEx distance
Addition to similarity type Wandora user can adjust similarity threshold. Similarity threshold is a value between 0 and 100. If similarity threshold is close to 100, compared strings must be very similar and only minimal differences are allowed. If similarity threshold is close to 0, compared strings can be very different and they are still considered as similar.
Some similarity measures use Gap cost and Tokenizer settings. First specifies a penalty caused by a gap in word (usually a space character). Latter is used to split words out of text.
Difference instead similarity option changes the similarity measure to a difference measure. If selected, Wandora searches for strings that are maximally different compared to given string.
Wandora views similarity search results below the search settings. To open any topic in the search results Wandora user can double click a topic name in the results dialog.
Query scripts
Query script tab is used to write and perform queries for Wandora's topic maps. A query is a little script that returns topics and string data distilled from the topic map. Wandora uses a non-standard query language that resembles functional languages such as LISP. Wandora's query language has a tutorial page of it's own.
