The <lcAsset> element was deprecated in DITA version 1.3. It was replaced with the <lcAsset2> element. It was originally intended to provide the images or other graphic assets to support the interaction.
See appendix for information about this element in OASIS document type shells.
+ topic/p learningInteractionBase-d/p learning-d/lcAsset
. . . <lcAsset> <image href="sunrise.gif"> <alt>the sun rising on Earth</alt> </image> </lcAsset> . . .