Using TextChart StudioThis part of the documentation describes what i2 TextChart Studio does, how it works, and how to use it.Getting startedWhen you start to use i2 TextChart Studio for the first time, you need to log in, provide your license information, and perform some initial customization.Corpus managementWhen you first log in to i2 TextChart Studio, you're prompted to create an initial corpus of documents that you'll use to evaluate the changes you make to the LxBase. optionally, you can create multiple, named corpora with different sets of documents.Viewing corpus resultsBy default, the Active Corpus page contains information about a single document in that corpus. Here, you can view a single document with hit highlights, select certain entities to view, explore the lexical items, and view rule traces.Exploring processed textTextChart Studio's Text tab allows you to modify the current LxBase directly, by interacting with the highlighted extraction results. Right-click any result to see a pop-up menu with a list of the available options.RelationshipsThe Relationships page allows you to interact with relationships between the entities in your extraction results. To open the page, click the View Relationships button in the vertical toolbar.Search pageYou can use the Search page in TextChart Studio to perform a fuzzy search across all the documents in a corpus. To open it, click the Search button in the vertical toolbar.Token definition editorTextChart Studio's Token Definition Editor page enables you to add or modify semantic vectors in the LxBase. To open the page, click the Edit Token Definitions button in the vertical toolbar.Modifying relationshipsTextChart extracts relationships between entities through the use of predicate-subject-object (PSO) types that identify those relationships. It uses relational semantic vectors to designate words or small phrases as predicates.Modifying sentiment scoresi2 TextChart performs sentiment analysis by assigning scores to the polarity, mood, aspect, and intensity of each dictionary entry. You can use TextChart Studio to modify the sentiment scores of individual dictionary entries manually.Document zoningIf the corpora that you process with TextChart regularly contain documents with sections that you want to skip, you can configure LxBase to ignore them. TextChart Studio enables this behavior through document zoning.Modifying lexiconsIn TextChart studio, you can modify lexical items directly in the lexicon, or from the document view. To open the dictionary editor, click Edit lexicon in the LxBase section of the vertical toolbar.Editing TextChart rulesi2 makes all of the rules that control extraction available in a set of XML files. You can use TextChart Studio to modify the rules in the supplied set, or to write new rules of your own.Adding terms in bulkTextChart Studio provides two ways of adding terms to the lexicon in bulk. Through machine discovery, you can let the TextChart engine alert you to likely new terms in your documents so that you can add them. Alternatively, if you have a list of terms that you know TextChart does not understand, you can import and classify those terms by hand.Importing and exporting LxBasesTextChart Studio provides a tool for managing LxBase files, and for importing, exporting, and merging LxBases. To open the LxBase File Manager page, click Manage LxBase Files in the LxBase section of the vertical toolbar.GxBaseTextChart uses GxBase to retrieve names and geocoordinates for the places that it finds in documents in your corpora. The standard GxBase includes the National Geospatial Agency's (NGA) GNS, the United States Geological Survey's (USGS) GNIS, and i2's own internally developed gazetteer to provide worldwide coverage.MetricsTextChart Studio provides metrics about the active LxBase that you can review and act upon to improve the efficiency of the system. The items in the Metrics menu reveal information about lexical entries (including semantic vectors) and LxBase rules.Regression testingTextChart Studio has a built-in regression testing feature for measuring the impact that changes to the LxBase have on the output. When a corpus is active, all saved regression points are listed in a chart below the corpus entry in the Corpus Management page.GlossaryThe definitions in this list of terms that appear in i2 TextChart Studio apply only to it (and to other TextChart software). Some of the terms have different meanings in other i2 software.Parent topic: i2 TextChart Studio
