I was surprised to find out that there are gaps in the Mathematical alphanumeric symbols block (U+1d400 to u+1d7ff). The gaps are associated with the inclusion of similar symbols in other blocks, chiefly the Letterlike Symbols Block.
Examples of such gaps include U+1d49d, U+1d506, etc. But as a matter of convenience and simplicity, these missing codepoints could have been defined, as decomposing directly to the equivalents in Letterlike symbols, in the same manner that the Ångström sign decomposes to the letter Å. That would make these ranges contiguous. Is there a policy about leaving gaps in otherwise contiguous ranges of codepoints? --Oren Watson
