The poem is in rhyming hexameter couplets, often with anapaestic movement and a feminine caesura. In poetry, the caesura is used to diversify rhythmical progress and thereby enrich accentual verse. Each line of traditional Germanic alliterative verse is divided into two half-lines by a caesura. Those Old French lines invariably had a caesura after the fourth syllable. A fermata may be placed over a caesura to indicate a longer pause. The "caesure" (caesura, or pause) occurs after the 6th syllable, halfway through the line. This line uses caesura in the medial position. The length of a caesura where notated is at the discretion of the conductor. A variation of the format breaks the line at the "caesura" or pause. The opposite of an obligatory caesura is a bridge where word juncture is not permitted. Vers libre is liberated from traditional rules concerning metre, caesura and line end stopping. In later and freer verse forms, the caesura is optional. In Latin or Greek poetry, the caesura could be suppressed for effect in any line. The last line adds a fourth foot after the caesura. Finally, a caesura may be indicated.