This question has been answered by BobRay. See the first response.
Is the +id placeholder in a chunk that being processed by getResources? Something has to set that placeholder for it to work.
www.mydomain.com/modx/my_article_page_with_quipsnippet.html#anchor?quip_start=28&quip_limit=10
Did you try this?
www.mydomain.com/modx/my_article_page_with_quipsnippet.html#anchor?quip_start=28&quip_limit=10
www.mydomain.com/modx/my_article_page_with_quipsnippet.html?quip_start=28&quip_limit=10&blank=0#anchor
this might work...
www.mydomain.com/modx/my_article_page_with_quipsnippet.html?quip_start=28&quip_limit=10&blank=0#anchor
The problem is that whatever is using that quip_limit thinks that the #anchor is part of the value. So adding another dummy key->value pair that nobody uses might work.
It is correct for the anchor to come at the end, after the query string key->value pairs.
return '<pre>' . print_r($_REQUEST,1) . '</pre>';
[[!print_request]]
Array
(
[q] => blog/plugins-audio/waves/aphex-vintage-aural-exciter.html
[quip_start] => 61
[quip_limit] => 5
)