A single entry in the teaser's category mix.
Asset type with optional sub-type (e.g. "office", "retail/shopping_mall").
Location class: A, B, or C.
^-?(?:0|[1-9]\d*)(?:\.\d+)?(?:[eE][+-]?\d+)?$
Share of this category in the mix as a percentage (e.g., 70 = 70%). Values are 0-100, not fractions.