SYNOPSIS
    string * P_ADS  "Ads"

    string * Set(P_ADS, string * value)
    string * Query(P_ADS)
      or
    string SetAds(string * value)
    string QueryAds()

      also:
    string * AddAdjective (string|string * id)
    string * RemoveAdjective (string|string * id)

DESCRIPTION
    The property holds an array of strings with the required adjectives of
    the object. When specifying an object (like in present()), any of the
    adjectives may appear in random order in the designation before the
    id string.
    The strings set are mapped to lowercase, leading and trailing spaces
    are removed, sequences of embedded spaces are shrunk to just one
    space each.

    The adjectives of an object are to differentiate between objects of
    the same id.

    As the /std-things initialise P_ADS with generic id strings (to make
    'all things' possible), changes to P_ADS should happen JUST through
    these two lfuns:

      string * AddAdjective (string|string * ad)
        Adds <ad> to P_ADS and returns the new value of P_ADS.
        <id> may an array of strings as well.

      string * RemoveAdjective (string|string * ad)
        Removes <id> to P_ADS and returns the new value of P_ADS.
        <ad> may an array of strings as well.

    Note: any change to an object's current adjectives sets the value
    of the P_ID_PATTERN property back to 0.

EXAMPLE
    AddAdjective("red");
    AddAdjective(({"weird", "bunch of"});
    RemoveAdjective("fooish");

    Set(P_ADS, ({ "green" })); -- Sets "green" as only id. DO NOT DO THIS!

    To distinguish two sword objects, program them as:
      blue sword: AddId("sword"); AddAdjective("blue");
      red  sword: AddId("sword"); AddAdjective("red");
    DO NOT use constructs like AddId(({"sword", "red sword"}))!

AVAILABILITY
    Include: <properties.h>

    Availability: /std/thing(/description) and descendants.

SEE ALSO
    thing(S), ids(P), idpattern(P)