It is sometimes a nearly exact reproduction, _excepting the necessary change of key in the Subordinate theme and codetta_, and such modification of the transitional section as may be thereby involved.

Sometimes, however, considerable alteration is made, at times so elaborate (especially in broader examples) that, though preserving easy recognizability, the Recapitulation assumes the appearance of a new version of the Exposition, and becomes a more independent part of the design.
A _coda_ is almost always added; sometimes brief, but occasionally so elaborate and extensive as to merit the appellation "second Development." DISSOLUTION .-- When any section of a higher form starts out with a perfectly definite structural intention, pursues this intention for a time (sufficient to establish it), but then insensibly diverges and gradually adopts a new modulatory direction,--as transition into the following section,--the form is said to be dissolved.

Such dissolution takes place, naturally, within the _later_ section of the theme, or Part, or whatever it may be, whose actual, definite ending in the expected key is thus frustrated.

For instance, the second (or third) Part of a theme may be dissolved; or the last phrase of a period or double-period; or the repetition of a phrase.

And the dissolution is invariably applied before a transition or re-transition, as a means of interlocking the factors of the form more closely and coherently.
Therefore it is a process peculiarly adapted to the higher designs of composition, and is seldom omitted in the sonata-allegro form.