Scientific publications about corpus development:
  * [ftp://ftp.dcs.shef.ac.uk/home/robertg/papers/lrec00-ie-meets-cl-ter.pdf Temporal Annotations]
  * [http://www.l3s.de/~chirita/publications/chernov07building.pdf Test-Bed for Desktop Search]

Tools:
  * [http://projects.ldc.upenn.edu/ace/tools/2005Toolkit.html NIST/ACE Annotation Toolkit]

Guidelines:
  * [http://projects.ldc.upenn.edu/ace/docs/English-Entities-Guidelines_v6.1.pdf Named Entity Recognition]
  * [http://projects.ldc.upenn.edu/ace/docs/English-Relations-Guidelines_v6.0.pdf Relation Recognition]
  * [http://www.ldc.upenn.edu/Creating/ Creating a Data Corpus]