# Doc: xref to library not clickable

**URL:** <https://swi-prolog.discourse.group/t/doc-xref-to-library-not-clickable/2012>\
**Category:** SWI-Prolog web site and services\
**Tags:** bug\
**Created:** [March 14, 2020, 6:39pm UTC](https://swi-prolog.discourse.group/t/doc-xref-to-library-not-clickable/2012 "2020-03-14T18:39:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![peter.ludemann](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/peter.ludemann/32/48_2.png) [@peter.ludemann](https://swi-prolog.discourse.group/u/peter.ludemann)\
**Post date:** [March 14, 2020, 6:39pm UTC](https://swi-prolog.discourse.group/t/doc-xref-to-library-not-clickable/2012/1 "2020-03-14T18:39:40Z")

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Cross-references to library(…) aren’t clickable. (I think they used to be)  
Cross-references to predicates are clickable.

e.g. [SWI-Prolog -- library(pairs): Operations on key-value lists](https://www.swi-prolog.org/pldoc/man?section=pairs)

> See also
> 
> [keysort/2](https://www.swi-prolog.org/pldoc/man?predicate=keysort/2), `library(assoc)`