Interpretation of form

FORM (Hans-Joachim Kraus from PSALMS 60 - 150, Fortress Press, 1993) --
Attempts have been made to think of Psalm 71 as a collection of quotations.  It certainly is striking how often individual fragments of other psalms turn up in Psalm 71.  References are made especially to Psalms 22 and 31.  But all these observations only show that the author is conversant with the psalm tradition and freely draws on the wealth of available data. . . Psalms 71 belongs to the category of prayer songs.  It is an individual's (T-E-PH-L-H) that is presented in this psalm.  With a vow of praise the prayer song presses forward. . . (page 71).