Methods and systems for improved XBRL tagging and creation of XBRL instance documents are provided. In one embodiment, an XBRL instance document is created based upon an XBRL taxonomy generated based upon multiple base XBRL taxonomies modified to exclude existing XBRL attributes. A portion of a business document is displayed by a business document production application. A portion of the XBRL taxonomy is displayed by a tagging application manager integrated with the business document production application. Responsive to a selection of an XBRL attribute displayed within the XBRL taxonomy and a request to map the selected XBRL attribute to a selected cell or range of business data displayed within the business document, XBRL markup information is created by associating the selected XBRL attribute with the selected business data. An XBRL instance document is then generated based on the XBRL markup information and the business data.
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