XSLT and XPath Versions
An SPS is essentially an XSLT stylesheet. For each SPS you must set the XSLT version: 1.0, 2.0, or 3.0. You do this by clicking the appropriate toolbar icon: 
or 
or 
. The selection you make determines two things:
•Which of the three XSLT engines in StyleVision is used for transformations; StyleVision has separate XSLT 1.0, XSLT 2.0, and XSLT 3.0 engines.
•What XSLT functionality (1.0, 2.0, or 3.0) is displayed in the interface and allowed in the SPS. For example, XSLT 3.0 uses XPath 3.0, which is a much more powerful language than XPath 1.0 (which is used in XSLT 1.0) or XPath 2.0 (which is used in XSLT 2.0). Additionally, some SPS features, such as the table-of-contents feature, is available only with XSLT 2.0 and XSLT 3.0.
| Note: | In order to generate Text output, the XSLT version must be XSLT 2.0 or XSLT 3.0 |
XSLT transformations
XSLT transformations in StyleVision are used: (i) to generate output views in the interface; and (ii) to generate and save output files (HTML) from within the interface and via StyleVision Server. The XSLT engine used for transformations (Altova XSLT 1.0, 2.0, or 3.0 Engines) corresponds to the XSLT version selected in the SPS.
XSLT functionality in GUI
The functionality appropriate for each XSLT version relates mostly to the use of the correct XPath version (XPath 1.0 for XSLT 1.0, XPath 2.0 for XSLT 2.0, XPath 3.0 for XSLT 3.0). XPath expressions are widely used in StyleVision—most commonly in features such as Auto-Calculations and Conditional Templates—and there are interface mechanisms that require, and help you build, XPath expressions. The functionality of the correct XPath version is automatically made available in the interface according to the XSLT version you select.