Misleading documentation for QML BorderImage Element

QML BorderElement documentation, under "source" property, says "This property can also be used to refer to .sci files, which are written in a QML-specific, text-based format that specifies the borders, the image file and the tile rules for a given border image." There is no other documentation for the *.sci format.

The above quote suggests that one can specify the tile rules in the *.sci file, using the element properties of horizontalTileMode and verticalTileMode. This is incorrect, and those properties names do not work in *.sci files. After rooting around in the private QDeclarativeScaleGrid.cpp file, I discovered that the names were hardcoded in as horizontalTileRule and verticalTileRule.

This is very misleading and unintuitive. The end user developer should not have to examine Qt's private internal implementation files to discover what property names are valid for *.sci files.