Definition: The path length is computed as being the number of cross-references in the path.
Default value: The default filter is to return paths of length between 1 and 4
Menu to use: This window is opened by using the menu Filters ./ Filter on path length

• Use non biological relations:
   You can choose to use (or not to use) the non biological relations in result paths. A non biological relation is a cross-reference that cannot have a direct biological signification. For example a cross-reference from OMIM (disease) to PDB (3DStructure) would not have a biological meaning but reflects a "shortcut" defined by the annotator.
  In the default SRS model we did not use non biological relations, these filters will only be useful if you adapt this model to your needs.
   
• Use tools relations:
  You can choose to use (or not to use) tools links. Tools links are only available in the basic version, the current implementation of BioGuideSRS does not deal with tools.