CRF Feature Template

A CRF Feature Template is a Feature Description for a CRF-based Algorithm.

• • …
• Example(s):
  • an NER CRF Feature Template.
  • a Chunking CRF Feature Template.
• See: Sequence Tagging Feature, CRFpp Package.

---

---

References

2007

• (Kudo, 2007a) ⇒ Taku Kudo. (2007). “Preparing Feature Templates."
  • As CRF++ is designed as a general purpose tool, you have to specify the feature templates in advance. This file describes which features are used in training and testing.
  • Template basic and macro
  • Each line in the template file denotes one template. In each template, special macro %x[row,col] will be used to specify a token in the input data. row specfies the relative position from the current focusing token and col specifies the absolute position of the column.
  • Here you can find some examples for the replacements …

---