{{- $pages := where .Site.RegularPages "Type" "in" .Site.Params.mainSections -}}
{{- $notHidden := where .Site.RegularPages "Params.hidden" "!=" true -}}
{{- $filtered := ($pages | intersect $notHidden) -}}
{{- range $pages -}}
{{.Date.Format "2006-01-02T15:04:05Z07:00"}}{{"\t"}}{{ .Title }}{{ "\n" }}
{{- end -}}