Why Index Connector?
Use Index Connector to define additional input sources for indexing XML pages or any kind of feed. Check how to integrate AEM with Search & Promote
You can use a data feed input source to access content that is stored in a form that is different from what is typically discovered on a website using one of the available crawl methods. However, a data feed either comes from an XML document or from a comma- or tab-delimited text file, and contains the content information to index.