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What are the training sets?
To be trained, SVMs require positive and negative training sets. In the case of first pass curation, this means positive and negative papers, i.e. papers that do and do not have the data type of interest.
What papers should we use for training sets?
Ideally, and since there is sometimes discrepancy between what has been flagged and what actually gets curated, the best positive training set is the set of papers for which the data type of interest either has been or will be curated.
How many papers are enough?
The answer to this question depends, in part, on the data type. Previous experience with SVMs for first pass curation has indicated that 400 papers is a good starting point, but this number is a guideline, not a fixed rule. Reasonable results may be achieved with fewer papers if the features of a particular data type are distinct, more papers may be needed if features are not as distinct.
What if we don't have enough papers?
Not all data types have 400 curated papers. Some have much less. In these cases, the SVM approach may not be the best tactic. Other options include development of Textpresso categories and author curation.
Do we need the full text?
The full text of research articles is needed to perform SVMs for first pass curation. If the full text is not available from an existing Textpresso implementation, Ruihua will need to have the PMID of relevant papers so she can retrieve the full text.