Currently, many projects in GeoVista center (at Pennsylvania State University) deal with unstructured textual data and require parsing of space, time, and entitiy information from textual document. Trying to compare one of our text-mining tool with other projects, I stumbled across many freely available text-mining tools. However, comparing them directly wouldn’t have made sense as they offer different levels of functionality. Hence, I have classified text-mining approaches into four categories and the table below list some of the text-mining tools that are freely available online.
Classification of Text-mining approaches:
1. Keyword Extractors – Traditionally, text-mining tools mainly involve determining important keywords in a document. This is done by creating a “term vector matrix” and assigning certain score to each word. This approach forms the core of any search engine (checkout the table below).
2. Entity Extractor – Current text-mining tools go beyond identifying terms but they also try to classify these terms into basic categories such as person, orgnaization, city, region, money, etc. Such text-mining tools are often referred as “entity-extraction tools” (checkout the table below).
3. Entity Relation extractors: The objective here is not only to find entities mentioned in the document, but also how they are related to each other. I wasn’t able to find any freely available online tools that do this, but I am aware that some PennState researchers are working on this.
4. Document Relation Extractors: The objective here is to go beyound the limits of a single document and identify common themes between different documents and how they related to each other. I haven’t seen any tool that currently provide such feature.
List of text-mining tools
| Organization | Web Service | Online Tool | Type (based on above categories) | Freeware | Comments |
| Yahoo | Yes | NO | Keyword | Yes | |
| NaCTem | Yes | Yes | Keyword | Yes | |
| ClearForest SWS | Yes | Yes | Entity | Yes | They also provide Java Desktop client and Firefox Add |
| Translated Labs | No | Yes | Keyword | Yes | |
| TermeExtractor | No | Yes | Keyword | Yes | To use full version you need to create a login. Also the tool only works in Firefox. |
| Whatizit | Yes | Yes | Keyword/Entity | Yes | Whatizit has interesting concept of pipeline which allows you to select a vocabulary |
Based on my personal evaluation, I felt ClearForest SWS does a pretty good job of entity extraction. It was able to find people, organizations, cities, regions, country. Further it offers its technology and tools in various formats such as firefox addon, desktop java application, webservice, and an online tool. Below is an image of clearForest tool as a firefox-addon.
Enjoy
Ritesh Agrawal
Hy!
On http://www.nelsenso.it you can find some web tools around:
- Text Mining
- Text Summarization
- Text Classification
- Information Retrieval
Languages supported: Italian and English.
(free registration required)
Have fun!
hi nelsenso,
thanks for the link. I tried using summarization tool and its really interesting. Is there any SOAP webservice that I can use. I am building a tool that compares different text mining algorithm. It wil be nice to have Text Summarization over there.
Regards
ritesh
Hy Ritesh,
thanks for reply, I hope in the next future to have time to develop a SOAP webservice for NelSenso Text Mining Web Tools.
Stay Tuned!
A program that can perform Document Relation Extraction, once documents have been preprocessed into XML by an included component is Starlight. See links for more information.
http://starlight.pnl.gov/
http://www.futurepointsystems.com/
What kind of algorithm are consist of text mining? I have a problem looking for them algorithm? Thanks before
Hi arifin,
There are many different algorithms for text mining. I am not an expert of text mining but here are some points for you. Search for “Natural language Processing algorithms” and ‘latent semantic analysis’.
Very useful information. Thanks Guys!
CEO
Innovative Consulting
Lots of folks blog about this matter but you said really true words.
Hy ragrawal!
Finally It’s available the Nelsenso SOAP webservice that you can use: http://www.nelsenso.it/nelsensowebservice.asmx
This post is great. thank you for sharing these helpful infos. I appreciate your work man
Ritesh, et al,
Great work on putting this together.
I am trying to do something that does not seem to match what you have described.
I have a CSV text file with millions of rows. Each represents parts of an user action (has user name and date/time plus other data related to user action). Each user action consists of several rows in the text file. For example, a user entering a medication order will result in multiple rows in the text file (the rows will be close together in the file, but will not always appear as back to back rows in the file). We need to find the most common group of rows/records in the file so we know what are the most common user actions.
I was wondering if there is a name for this type of search and of any available tools (web-based preferably) that could assist.
Many thanks,
Xavier
Hi Xavier,
This seems to very specific problem and not related to text mining. This seems to be more of an aggregation problem. It’s difficult to say anything without completely understanding the data.
Really thanks for ur information and all the comments. It is really helpful for my FYP.
Hello Agrawal,
I guess that the tool and the information could be updated, the tool is not working?
hello agarwal,
i am new to the area of text mininh can pls help how to go about
Hi, you might to checkout http://www.nlp-class.org
Its free online class on natural langage understanding offered by stanford. Its pretty good and you will get a good understanding of the domain.
Is there any way to extract phase level relation
Hi…i’m doing my academic project on text mining.. we are using Pattern taxonomy model in which how to divide the documents into positive and negative documents..pls give some ideas