The def for the CC term "NURF complex" looks like it got written a long time ago. I think it needs to be updated. Here is the current:
A four subunit ISWI-containing protein complex that facilitates nucleosome mobility and transcriptional activation in an ATP-dependent manner. In contrast to other chromatin remodeling complexes, the ATPase activity of NURF requires nucleosomes rather than free DNA or histones.
However, this review:
Alkhatib SG, Landry JW. The nucleosome remodeling factor. FEBS Lett. 2011 Oct
20;585(20):3197-207. doi: 10.1016/j.febslet.2011.09.003. Epub 2011 Sep 9. Review.
PubMed PMID: 21920360.
indicates that this def is specific to the Drosophila form of the complex, while the mammalian form is slightly different:
NURF was first identified in Drosophila melanogaster as an ATP-dependent biochemical activity that enhanced GAGA factor (GAGAG binding factor)-mediated nuclease accessibility to reconstituted chromatin  and . Biochemical purification of this activity revealed a four subunit complex composed of NURF301, the ATPase ISWI (NURF140), NURF55 and NURF38 polypeptides . Purifications from human cells identified a complex highly homologous to D. melanogaster NURF, strongly suggesting that it has been conserved through evolution . Homo sapiens NURF contains the NURF301 homolog BPTF, the ISWI homolog SNF2L, and a NURF55 homolog pRBAP46/48; however, a NURF38 homolog has not been identified 
Here is a proposed new def:
Def: An ISWI-type chromatin remodeling complex that facilitates nucleosome mobility in an ATP-dependent manner. In contrast to some other chromatin remodeling complexes, the ATPase activity of NURF requires nucleosomes rather than free DNA or histones. In Drosophila, where the complex was first identified, it consists of four subunits, NURF301, the ATPase ISWI (NURF140), NURF55 and NURF38. In humans, this complex contains BPTF (a NURF301 homolog), SNF2L (an ISWI homolog), and pRBAP46/48 (a NURF55 homolog), but a NURF38 homolog has not been identified. Note that mammals have two ISWI homologs, SNF2L and SNF2H; NURF forms preferentially with SNF2L. Note also that alternately spliced forms of some of these genes have been observed in multiple organisms, so there may be some variability in the exact protein isoforms present in NURF family complexes.
Note: The phrase "nucleosome remodeling factor complex" is currently an exact synonym of "NURF complex", and the NURF name is based on this phrase. However, this phrase is equally true for CERF as it is also a "nucleosome remodeling factor complex". Not sure how best to deal with this, but wanted to point it out.