Holds information for one node in the SCOP hierarchy.

Attributes:

• sunid - SCOP unique identifiers
• nodetype - One of ‘cl’ (class), ‘cf’ (fold), ‘sf’ (superfamily), ‘fa’ (family), ‘dm’ (protein), ‘sp’ (species), ‘px’ (domain). Additional node types may be added.
• sccs - SCOP concise classification strings. e.g. b.1.2.1
• name - The SCOP ID (sid) for domains (e.g. d1anu1), currently empty for other node types
• description - e.g. “All beta proteins”,”Fibronectin type III”,