DtSearch: A Comprehensive Search Experience

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DtSearch offers a comprehensive search experience that's hard to beat. Its robust indexing capabilities allow it to search through vast amounts of data in seconds.

With the ability to index over 250 file formats, including PDFs, Office documents, and images, DtSearch can handle even the most complex search tasks with ease.

DtSearch's search algorithms are designed to provide accurate and relevant results, making it an ideal choice for professionals and researchers alike.

Its advanced features, such as phrase searching and proximity searching, enable users to refine their search queries and get precise results.

Worth a look: Contextual Searching

DtSearch Products

DtSearch offers a range of products tailored for software developers.

Their dtSearch Engine is available for Windows, Linux, and Mac, each with different API options. The Windows version supports C++, .NET, COM, Java, and Delphi APIs, while the Linux and Mac versions support C++ and Java APIs.

The dtSearch Engine for Windows comes in 32-bit and 64-bit versions, providing flexibility for different system requirements.

Document Filters are included with all dtSearch products and are also available for separate licensing.

Here's a breakdown of the available dtSearch products:

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DtSearch allows you to use wildcard characters in your search queries. A ? in a word matches any single character, and a * matches any number of characters. For example, appl* would match words like "apple" and "application".

You can also use the NOT operator to exclude specific words or phrases from your search results. NOT standing alone can be the start of a search request, and it's used to retrieve all documents that do not contain a certain word. For example, not pear would retrieve all documents that do not contain the word "pear".

To search for a word or phrase not in association with another word or phrase, use the NOT W/ operator. This operator is not symmetrical, so apple not w/20 pear is not the same as pear not w/20 apple.

Here's a summary of the search connectors you can use:

Syntax Guide

You can use the wildcard characters * and ? in your search word to match multiple variations of a term.

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A ? in a word matches any single character, and a * matches any number of characters. For example, appl* would match apple, application, etc.

The wildcard characters can be in any position in a word. For example, *cipl* would match principle, participle, etc.

Using the * wildcard character near the beginning of a word will slow searches somewhat.

Constructing Search Requests

You can use quotation marks to search for phrases, put + in front of words or phrases that are required, and - in front of words or phrases to exclude them.

Examples include "banana pear" and "apple and pear".

Boolean searches consist of a group of words or phrases linked by connectors like and and or.

For example, apple and pear means both words must be present, while apple or pear means either word can be present.

Special Characters

The ? wildcard character matches any single character, as seen in the example appl? which matches apply or apple.

The * wildcard character matches any number of characters, as seen in the example appl* which matches application.

Credit: youtube.com, Searching with Boolean Operators

Here is a list of special characters and their uses:

Synonym

Synonym searching is a powerful tool that can help you find related words in your search results. It's enabled by adding the & character after certain words in your request, like in the example "fast& w/5 search".

You can choose how dtSearch expands synonyms, using either user-defined sets, the built-in thesaurus, or a combination of both.

Some types of complex expressions using the W/N connector can produce ambiguous results, so it's best to avoid them.

To use synonym searching effectively, you need to understand the different types of expansion available, including using only user-defined synonyms or the built-in thesaurus.

Ambiguous search requests, like those that use the W/N connector, should be avoided to get accurate results.

Not W/n

The NOT W/n operator is a powerful tool for excluding specific words or phrases from your search results. It allows you to search for a word or phrase while excluding cases where it's too close to another word or phrase.

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Using NOT W/n is not symmetrical, meaning the order of the words matters. For example, searching for "apple not w/20 pear" is not the same as searching for "pear not w/20 apple".

To use NOT W/n, you can add the operator to a search request, just like you would with the W/ operator. For instance, "apple not w/20 pear" will search for "apple" and exclude cases where "apple" is too close to "pear".

Indexing and Configuration

To configure dtSearch, start by opening the dtSearch Indexer application, preferably the 64-bit version. This will be the foundation for creating and managing your indexes.

You'll need to select a location for the dtSearch data folder, such as e:\dtSearch_Index. This is where all your indexed data will be stored.

Next, create a new index by selecting the "Create Index" option and entering a name for your index. You can then specify the location for the index, which should match the UNC path used by MWD Server Shares.

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To add file share locations to your index, you'll need to manually enter the UNC path for each share. Make sure these paths match the UNC path used by MWD Server Shares in the MyWorkDrive Admin panel.

To include file names in your index, open the dtSearch desktop client and go to Options > Preferences. Check the boxes for "Index filenames as text" and "Include Path Information".

After making these changes, you'll need to re-launch the dtSearch Index Manager and click "Update Index" to update your index with the new path information.

To schedule updates for your index, create a new task in the dtSearch Index Manager and set it to run after hours daily or more often as desired. Be sure to create a service account with permissions to the files that will run the scheduled task.

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Configure Indexer

To configure the indexer, open the dtSearch Indexer application and select the option to create a new data folder. This folder will store the index files.

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Use a 64-bit version of the dtSearch Indexer application to ensure compatibility. The data folder should be created on a local drive, such as E:\dtSearch_Index.

To create a new index, select the "Create Index" option and enter a name for the index. Accept the location where the index will be stored.

You'll need to add the file share locations you want to index, using the UNC path for each share. Make sure these paths match the UNC paths used by MWD Server Shares.

To add the file share locations, manually type in the path for each share. Click "Update Index" and then "Start Indexing" to begin the indexing process.

It's essential to note that the MyWorkDrive Share paths specified in the MWD Admin panel should also be the network UNC path and match the path specified in dtSearch.

To include file names in the index, open the dtSearch desktop client and go to options > preferences. Check the boxes for "Index filenames as text" and "Include Path Information".

After making these changes, re-launch the dtSearch Index Manager and click "Update Index" to update the index with path information.

To schedule updates, create a new task to update the indexes as desired. Set it to run after hours daily or more often, using a service account with permissions to the files.

Test

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Testing your search engine is a crucial step in ensuring it's working correctly. To test dtSearch, open the dtSearch Desktop application and navigate to the Search menu.

From there, select the Search option. In the search pop-up, enter your search term in the Search request field. Click the Search button to initiate the search.

Verify that dtSearch returns the expected results for your search term, which is a key indicator of its effectiveness.

Search Features

DtSearch offers a flexible search experience that can be integrated into various software programs. This flexibility allows users to find documents more efficiently.

Both Keyword Search and dtSearch are main search engines in Relativity, each with its own capabilities and search options. Keyword search uses an automatically populated index and supports Boolean operators, while dtSearch provides a more powerful and flexible search experience.

You can use fuzzy searching to find words even if they're misspelled. For example, a fuzzy search for "apple" will find "appple." Fuzzy searching can be useful when searching text with typographical errors or text scanned using OCR.

To add fuzziness to searches, you can check the "Fuzzy searching" box and adjust the level of fuzziness from 1 to 10. Alternatively, you can use the % character to selectively add fuzziness. For instance, adding one % character will ignore one difference when searching for a word.

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Flexible Experience

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In Relativity, you can use both Keyword Search and DTSearch to find the documents you need. These two search engines offer different capabilities and search options for users.

Keyword Search uses an automatically populated index and supports Boolean operators, making it a great option for simple searches. With a little practice, Keyword Search can be effective for finding the documents you need.

DTSearch, on the other hand, provides a more powerful and flexible search experience with proximity, stemming, and fuzziness operators. This makes it ideal for more complex searches where you need to find specific words or phrases.

To take advantage of DTSearch's flexibility, you can use proximity operators to search for words that are close to each other. This can be especially useful when searching for phrases or quotes.

Here are some examples of proximity operators you can use in DTSearch:

By using DTSearch's proximity operators, you can refine your search results and find the documents you need more efficiently.

Natural Language

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Natural language search requests are any combination of words, phrases, or sentences. This type of search allows the search engine to understand the context and intent behind the search query.

The search engine weights the retrieved documents based on their relevance to the search request. It considers the number of documents each word in the search request appears in, which helps to determine the usefulness of each word in distinguishing relevant from irrelevant documents.

The more documents a word appears in, the less useful it is in distinguishing relevant from irrelevant documents. This means that common words like "the" and "and" are likely to be ignored by the search engine.

Noise words and search connectors like NOT and OR are also ignored by the search engine. This helps to refine the search results and provide more accurate matches to the search query.

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Phonic

Phonic searching is a type of search that looks for words that sound like the word you're searching for, and it's especially useful when you're not sure of the exact spelling.

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To enable phonic searching, you can put a # symbol in front of the word in your search request, like this: #smith. This will find words that sound like "smith", such as Smithe and Smythe.

Phonic searching is a bit slower than other types of searching, and it can make searches over-inclusive, so it's usually better to use the # symbol to do phonic searches selectively.

Identify Dates, Emails, Credit Cards

If you select the Recognize Dates/Email Addresses/Credit Cards setting within your project, you can execute searches for various formats of dates, email addresses, or credit card numbers.

This setting is not selected by default, so you'll need to make sure to activate it if you want to use this feature.

Activating this feature will dramatically impact indexing and searching performance, so be aware of the potential trade-offs.

Recognizing dates can be particularly useful when searching for documents related to a specific time period.

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Variable Term Weighting

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Variable Term Weighting allows you to assign different weights to specific terms in your search request. You can specify the relative weights for each term, like in the example "apple:5 and pear:1", where apple is weighted five times as heavily as pear.

This technique can be particularly useful when you want to emphasize certain terms over others in your search results. For instance, if you're searching for documents related to apples and pears, you can use this method to give more importance to the term "apple".

In a natural language search, dtSearch automatically weights terms based on their distribution in your documents. This means that the more frequently a term appears in your documents, the more weight it will be given.

By providing specific term weights, you can override the weights that dtSearch would otherwise assign. This gives you more control over the search results and allows you to fine-tune your searches to suit your needs.

Comprehensive Comparison

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DTSearch is a powerful tool that allows you to index and search documents quickly and efficiently.

It uses a more complex algorithm than keyword search, which can search for variations of a word, like "document" and "documents."

DTSearch understands basic operators like AND and OR, which means you can construct more specific queries, like searching for a list of terms that must all appear in the document.

This makes it ideal for searching large volumes of documents and performing complex queries.

Keyword search, on the other hand, is a simpler method that involves searching for specific words or phrases within a document.

It produces search results that match the exact words or phrases you are looking for, but can also produce "noise" – irrelevant documents that contain the same keywords.

DTSearch is the better option if you need to search a large volume of documents and need to perform complex queries, but keyword search may be more useful if you need to find specific documents based on keywords or phrases.

Relativity, a popular e-discovery platform, allows you to utilize both DTSearch and keyword search, so you can choose the one that best suits your needs.

Tips and Hacks

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DtSearch is a powerful tool for complex searches, but it can be slower and more resource-intensive, especially with large datasets.

To get the most out of DtSearch, evaluate your search requirements and consider the type of data you're searching. If you're dealing with unstructured or semi-structured data, DtSearch may provide more accurate results.

DtSearch offers advanced features like concept clustering and document summarization, which can save time and improve efficiency in document review. However, this comes at a cost, and keyword search may be a more affordable option for smaller projects.

Here are some key differences to keep in mind:

  • Keyword search uses the "OR" operator, while DtSearch uses more complex operators like "NEAR" or "FOLLOWEDBY".
  • Keyword search is limited to exact matches, while DtSearch can handle more complex queries.
  • DtSearch is better suited for larger document sets, while keyword search is better for smaller datasets.

Useful Tips

When evaluating your search requirements, it's essential to consider the size of your dataset and the complexity of your query. If you're dealing with a smaller dataset or a simple query, keyword search might be a good fit.

Keyword search can be a quick way to find a specific document, but it may not provide the most accurate results, especially when dealing with unstructured or semi-structured data. dtSearch Relativity, on the other hand, uses advanced algorithms to extract meaning from the data, making it a better choice for complex searches.

Explore further: Web Query Classification

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Consider your workflow and think about what features are essential for your document review process. If you need additional features like concept clustering and document summarization, dtSearch Relativity is the way to go.

Factoring in cost is also crucial when deciding between keyword search and dtSearch Relativity. Depending on your organization's budget and size, keyword search might be a more affordable option for smaller projects, while dtSearch Relativity's more advanced capabilities may be worth the investment for larger teams or long-term projects.

Ultimately, it's essential to evaluate user experience and consider the skill level and expertise of your team. If you're new to document search, keyword search might be easier to use and more intuitive, while dtSearch Relativity might require more training and familiarity with the software.

Here are some key differences to consider:

Hacks

One key hack is to use the "OR" operator in keyword search to combine different search terms.

Keyword search can be limited by the fact that you're only searching for exact matches of specific terms, making it less effective for complex queries.

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DTSearch offers more advanced features for complex queries, such as using the "NEAR" or "FOLLOWEDBY" operators to narrow down search results.

Using DTSearch can be slower and more resource-intensive, especially when working with a large number of documents.

Relativity, a popular e-discovery platform, utilizes both DTSearch and keyword search, making it a great example of how these two approaches can be used together.

Relativity Differences

DtSearch is a powerful tool for searching through large sets of documents, and it's often the preferred method in platforms like Relativity.

Keyword searches are a good way to find documents related to a specific topic, but they can be prone to "noise" or irrelevant results.

DTSearch indexes the entire document and generates a list of relevant words and phrases, making it a more effective tool for complex queries or larger sets of documents.

In Relativity, DTSearch is often used to search through large sets of legal documents, and it utilizes advanced techniques like fuzzy searching, stemming, and synonym expansion to ensure accurate results.

DTSearch can handle metadata and document content seamlessly, supporting over 25 file types.

Frequently Asked Questions

What does DT stand for in dtSearch?

DT stands for D T, which is an abbreviation of David Thede, the founder of dtSearch Corp. This naming convention is a nod to the company's origins and founder.

What is the difference between Lucene and dtSearch?

dtSearch and Lucene have similar character treatment, but dtSearch considers "_" as a letter, allowing it to be indexed without word breaks. This difference is only relevant if the default alphabet file hasn't been customized.

Francis McKenzie

Writer

Francis McKenzie is a skilled writer with a passion for crafting informative and engaging content. With a focus on technology and software development, Francis has established herself as a knowledgeable and authoritative voice in the field of Next.js development.

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