Knowledge Extraction

The Knowledge Graph Extraction Service enables you to effortlessly move your enterprise’s existing Frequently Asked Questions- FAQ content – into bot ontology.

The feature supports the extraction from unstructured content such as web pages and PDF documents as well as from structured content such as CSV files.

After completing the extraction, you can edit the question and answers using an easy-to-use interface and organize them under the relevant Knowledge Graph nodes.

Extraction Process

Moving data using the Knowledge Extraction (KE) Service to the Knowledge Collection involves the followings steps:

• Step 1 Extracting: Extract the existing FAQ content from structured or unstructured sources of question-answer data such as PDF, web pages, and CSV files. This extraction can be done before or after creating a Knowledge Collection for the bot.
  Note: The KE service supports specific content structure for each source type. Refer to the Supported formats section for details.
  
• Step 2 Editing: Upon successful data extraction, you can edit the questions and answer text before moving it to the Knowledge Graph.
• Step 3 Moving: You can add data into a Bot before or after creating a Knowledge Graph (KG). If you try to add the extracted content to a KG before it exists, the bot creates automatically create one with the Bot’s name.

The Knowledge Extractor allows you to add the extracted content to the Knowledge Graph:

• Add to Knowledge Graph: moves the selected questions to the root node of the Knowledge Collection. You can use this option when the required term is not yet added to the KG or when the Bot does not have a KG.
• Add to Specific Term: If the bot already consists of a Knowledge Collection, you drag-drop the selected content to the required nodes.

Extracting from a Website

1. Open the bot into which you want to extract the content and click the Knowledge Collection tab.
2. Under Extracts section, click Extract from URL.
3. Enter a Name for extraction.
4. Enter the URL of the page, and then click Proceed.
   
5. Once the extraction is complete, the page with the Success status appears.

Extracting from File

1. Open the bot into which you want to extract the content and click the Knowledge Collection tab.
2. From the Extracts section, from the tab Extract from file, click Browse.
3. Browse to the file – PDF or CSV formatted, select the file and then click Proceed.
4. Once the extraction is complete, a page with the Success status will be displayed.

Editing the Extracted Content

1. Open the bot and click the Knowledge Collection tab.
2. The Knowledge Extraction section displays the list of all extractions.
   
3. Click the name of a successful extract whose content you want to edit.
4. Hover over the question-answer pair to modify it and click the edit icon.
5. Make the necessary changes and click Save.
   

Adding the Extracted Content

There are two ways to add the extracted content to the Knowledge Collection.

From the Extracts Section

1. Open the bot and click the Knowledge Collection tab.
2. From the Knowledge Extraction section, select the name of a successful extract whose content you want to add.
3. Drag and drop the required Q&A to the node/term to which you want to add. As you drag and drop the child nodes will be expanded.
4. You can select multiple Q&As and do a bulk move.

From Knowledge Collection

1. Open the bot and click the Knowledge Collection tab.
2. Select the node to which you want to add these Question-Answers.
3. Click Add from extraction. It opens the list of successful and failed extractions.
4. Click the name of a successful extract whose content you want to move.
5. Select the checkboxes next to the question-answer pairs that you want to move and then click Add.

Note: Once you move a question-answer pair from the extract to the knowledge collection, you cannot move it again. The platform throws a duplicate error when you try to move a question from the extract that’s already present in the collection. You can make any changes to the moved content from the knowledge collection. However, if the question is modified or removed in the KG, then the developer would be allowed to add it again to the KG.

Supported Formats

The Knowledge Extraction service supports extracting FAQs only from supported CSV, PDF and URL formats.

CSV

• The KE service interprets the text in the first column as a question and that in the second column as an answer.
• The file should not have any headers.
• The KE service ignores any headers and the text present in the other columns.

PDF

The Knowledge Extraction service can process the content from a PDF and convert into question-answer pairs. It can efficiently extract content from documents that have a table of contents and the text is formatted with uniform header and paragraph blocks. The service has limitations in extracting the content from documents with nested headers and multi-format text.

Web Pages

The Knowledge Extraction service supports the following three different formats of FAQ web pages:

• Plain FAQ Pages with linear question-answer pairs
• Pages with question hyperlinks that point to answers on the same page.
• Pages with question hyperlinks that point to answers on a different page.

Extraction of certain FAQs on the webpage fails under the following conditions:

• The question text is split between multiple HTML tags on the FAQ page.
• The tag applied to the answer is neither the child nor the sibling of the extracted question as per the HTML DOM structure.
• The question doesn’t have a hyperlink to the answer (applies to FAQs with hyperlinks)
• When the questions hyperlink to the answer, but the question statement isn’t repeated above the answer (applies to FAQs with hyperlinks)

The extraction of the entire FAQ page fails if the page consists of more than one FAQ page types mentioned above.