diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 40c75b8c..cfff312d 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -38,7 +38,7 @@ jobs:
           devtools::check(error_on = "warning")
       - name: Build Package Website
         run: |
-          muggle::build_site2()
+          muggle::build_site2(override = list(new_process = FALSE))
       - name: Build Buildtime Image
         uses: docker/build-push-action@v1
         with:
diff --git a/NAMESPACE b/NAMESPACE
index 8f075489..b939bc4d 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -11,6 +11,7 @@ export(cr_compliance_overview)
 export(cr_funder_df)
 export(cr_has_orcid)
 export(cr_tdm_df)
+export(doi_examples)
 export(draft_report)
 export(emailReport)
 export(emailReportServer)
@@ -44,7 +45,6 @@ export(runMetacheck)
 export(smtp_send_mc)
 export(tabulate_metacheckable)
 export(tdm_metrics)
-export(tu_dois)
 export(vor_issue)
 import(dplyr)
 import(purrr)
diff --git a/R/communicate.R b/R/communicate.R
index e42b483f..f56881b8 100644
--- a/R/communicate.R
+++ b/R/communicate.R
@@ -99,7 +99,7 @@ mcControlsServer <- function(id, translator = mc_translator()) {
       shiny::observe(shiny.i18n::update_lang(session, lang()))
       dois <- biblids::doiEntryServer(
         id = "dois",
-        example_dois = tu_dois()[1:30],
+        example_dois = doi_examples$good[1:30],
         char_limit = 50000L,
         translator = translator,
         lang = lang
diff --git a/R/cr_md_funder.R b/R/cr_md_funder.R
index cd557fb7..ddfb41af 100644
--- a/R/cr_md_funder.R
+++ b/R/cr_md_funder.R
@@ -32,4 +32,3 @@ empty_funder <- function(cr) {
   }
   out
 }
-
diff --git a/R/data.R b/R/data.R
index 3bd8c3db..5136b123 100644
--- a/R/data.R
+++ b/R/data.R
@@ -1,31 +1,43 @@
-#' Some DOIs for testing
-#' @keywords internal
-#' @export
-tu_dois <- function() {
-  readr::read_lines(file = system_file2("extdata", "dois", "tu.txt"))
-}
-
-#' Long list of DOIs
-#' @noRd
-dois_many <- function() {
-  res <- readr::read_lines(file = system_file2("extdata", "dois", "many.txt"))
-  biblids::as_doi(res)
-}
+# ==== example dois
 
-#' Some troublesome DOIs for testing
-#' @noRd
-dois_weird <- function() {
-  c(
-    # these are roughly in the order of metacheckable predicates
-    "10.1000/1",
-    NA, # there's no meaningful metadata for an NA DOI
-    "doi:10.1000/1", # duplicated from above
-    "10.3389/fbioe.2020.00209", # actually from CR
-    "10.1000/2",
-    "10.1000/3", # would exceed limit of 4
-    # caused issues in https://github.com/subugoe/metacheck/issues/181
-    "10.1007/s00330-019-06284-8",
-    # caused issues in https://github.com/subugoe/metacheck/issues/181
-    "10.1007/s00431-018-3217-8"
-  )
-}
+#' DOIs included in the package for testing and illustration
+#' @format A list of [biblids::doi()] vectors, including:
+#' - `good`: Guaranteed to work (all are [is_metacheckable()]).
+#' - `many`: Long list of DOIs.
+#' - `weird`: Troublesome DOIs.
+#' - `biblids`: [biblids::doi_examples()]
+#' 
+#' @examples
+#' doi_examples$good
+#' 
+#' @family data
+#' @export
+doi_examples <- list(
+  # these are originally from TU users
+  good = biblids::as_doi(
+    readr::read_lines(
+      file = system.file("extdata", "dois", "tu.txt", package = "metacheck"))
+  ),
+  many = biblids::as_doi(
+    readr::read_lines(
+      file = system.file("extdata", "dois", "many.txt", package = "metacheck")
+    )
+  ),
+  weird = biblids::as_doi(
+    c(
+      # these are roughly in the order of metacheckable predicates
+      "10.1000/1",
+      NA, # there's no meaningful metadata for an NA DOI
+      "doi:10.1000/1", # duplicated from above
+      "10.3389/fbioe.2020.00209", # actually from CR
+      "10.1000/2",
+      "10.1000/3", # would exceed limit of 4
+      # caused issues in https://github.com/subugoe/metacheck/issues/181
+      "10.1007/s00330-019-06284-8",
+      # caused issues in https://github.com/subugoe/metacheck/issues/181
+      "10.1007/s00431-018-3217-8",
+      "10.3389/fmech.2020.566440/full"  # superfluous url fragment
+    )
+  ),
+  biblids = biblids::doi_examples()
+)
diff --git a/R/email.R b/R/email.R
index 889ff85d..4f9e51c1 100644
--- a/R/email.R
+++ b/R/email.R
@@ -119,7 +119,7 @@ block_text_centered_vec <- function(...) {
 #' @param session_id Character vector to identify current shiny session
 #' @inheritDotParams blastula::render_email
 #' @export
-mc_render_email <- function(dois = tu_dois()[1:10],
+mc_render_email <- function(dois = doi_examples$good[1:10],
                             translator = mc_translator(),
                             session_id = NULL,
                             ...) {
diff --git a/R/metacheck_package.R b/R/metacheck.R
similarity index 100%
rename from R/metacheck_package.R
rename to R/metacheck.R
diff --git a/R/metrics_cc.R b/R/metrics_cc.R
index 0a0d74c6..659bcb11 100644
--- a/R/metrics_cc.R
+++ b/R/metrics_cc.R
@@ -1,28 +1,22 @@
-#' CC license variants metrics overview
+#' Diagnose Creative Commons Licensing
+#' @family transform
+#' @examples
+#' # obtain metadata from Crossref API
+#' req <- get_cr_md(doi_examples$good)
 #'
-#' Presents normalised CC licence variants like BY (absolute and relative)
+#' # check article-level compliance
+#' out <- cr_compliance_overview(req)
+#' @name cc
+NULL
+
+#' @describeIn cc Presents normalised CC licence variants.
+#' For example, `BY` (absolute and relative).
 #'
 #' @param cc_license_check tibble, result from [license_check()]
-#'
 #' @export
-#'
 #' @examples
-#' \dontrun{
-#' my_dois <- c("10.5194/wes-2019-70", "10.1038/s41598-020-57429-5",
-#'   "10.3389/fmech.2019.00073", "10.1038/s41598-020-62245-y",
-#'   "10.1109/JLT.2019.2961931")
-#'
-#' # Workflow:
-#' # First, obtain metadata from Crossref API
-#' req <- get_cr_md(my_dois)
-#'
-#' # Then, check article-level compliance
-#' out <- cr_compliance_overview(req)
-#'
-#' # Obtain CC variants metrics
+#' # obtain CC variants metrics
 #' cc_metrics(out$cc_license_check)
-#' }
-#' @keywords internal
 cc_metrics <- function(cc_license_check = NULL) {
   is_cr_license_df(cc_license_check)
   cc_license_check %>%
@@ -30,25 +24,13 @@ cc_metrics <- function(cc_license_check = NULL) {
     dplyr::mutate(prop = .data$value / sum(.data$value) * 100)
 }
 
-#' CC compliance metrics overview
-#'
-#' Presents the result of the CC compliance check (absolute and relative)
+#' @describeIn cc Presents the result of the CC compliance check.
+#' Absolute and relative normalised CC licence variants.
 #'
 #' @seealso [license_check()]
-#'
-#' @inheritParams cc_metrics
-#'
 #' @export
-#'
 #' @examples
-#' # Workflow:
-#' # First, obtain metadata from Crossref API
-#' req <- get_cr_md(tu_dois()[7:10])
-#'
-#' # Then, check article-level compliance
-#' out <- cr_compliance_overview(req)
-#'
-#' # Obtain CC compliance check resutls metrics
+#' # Obtain cc compliance check resutls metrics
 #' cc_compliance_metrics(out$cc_license_check)
 #' @keywords internal
 cc_compliance_metrics <- function(cc_license_check = NULL) {
diff --git a/R/metrics_funder.R b/R/metrics_funder.R
index 82390a81..88393f51 100644
--- a/R/metrics_funder.R
+++ b/R/metrics_funder.R
@@ -10,22 +10,15 @@
 #' @param funder_info tibble obtained with [cr_funder_df()] or [cr_compliance_overview()]
 #' @export
 #'
-#' @examples \dontrun{
-#' ## Some DOIs from OA articles
-#' my_dois <- c("10.5194/wes-2019-70", "10.1038/s41598-020-57429-5",
-#'   "10.3389/fmech.2019.00073", "10.1038/s41598-020-62245-y",
-#'   "10.1109/JLT.2019.2961931")
-#'
-#' # Workflow:
+#' @examples
 #' # First, obtain metadata from Crossref API
-#' req <- get_cr_md(my_dois)
+#' req <- get_cr_md(doi_examples$good)
 #'
 #' # Then, check article-level compliance
-#  out <- cr_compliance_overview(req)
+#' out <- cr_compliance_overview(req)
 #'
 #' # Obtain funder metrics overview
 #' funder_metrics(out$funder_info)
-#' }
 #' @keywords internal
 funder_metrics <- function(funder_info = NULL) {
   is_cr_funder_df(funder_info)
diff --git a/R/metrics_overview.R b/R/metrics_overview.R
index 0d3a0cb5..c386ce93 100644
--- a/R/metrics_overview.R
+++ b/R/metrics_overview.R
@@ -18,22 +18,15 @@
 #'
 #' @export
 #'
-#' @examples \dontrun{
-#' ## Some DOIs from OA articles
-#' my_dois <- c("10.5194/wes-2019-70", "10.1038/s41598-020-57429-5",
-#'   "10.3389/fmech.2019.00073", "10.1038/s41598-020-62245-y",
-#'   "10.1109/JLT.2019.2961931")
-#'
-#' # Workflow:
+#' @examples
 #' # First, obtain metadata from Crossref API
-#' req <- get_cr_md(my_dois)
+#' req <- get_cr_md(doi_examples$good)
 #'
 #' # Then, check article-level compliance
-#  out <- cr_compliance_overview(my_dois)
+#' out <- cr_compliance_overview(req)
 #'
 #' # Finally, obtain compliance metrics overview
-#' metrics_overview(out)
-#' }
+#' metrics_overview(out$cr_overview)
 #' @keywords internal
 metrics_overview <- function(cr_overview = NULL) {
   is_cr_overview_df(cr_overview)
diff --git a/R/metrics_tdm.R b/R/metrics_tdm.R
index f6a505dc..f0b29c5e 100644
--- a/R/metrics_tdm.R
+++ b/R/metrics_tdm.R
@@ -12,22 +12,15 @@
 #' @param tdm tibble obtained with [cr_tdm_df()] or [cr_compliance_overview()]
 #' @export
 #'
-#' @examples \dontrun{
-#' ## Some DOIs from OA articles
-#' my_dois <- c("10.5194/wes-2019-70", "10.1038/s41598-020-57429-5",
-#'   "10.3389/fmech.2019.00073", "10.1038/s41598-020-62245-y",
-#'   "10.1109/JLT.2019.2961931")
-#'
-#' # Workflow:
+#' @examples
 #' # First, obtain metadata from Crossref API
-#' req <- get_cr_md(my_dois)
+#' req <- get_cr_md(doi_examples$good)
 #'
 #' # Then, check article-level compliance
-#  out <- cr_compliance_overview(req)
+#' out <- cr_compliance_overview(req)
 #'
 #' # Finally, obtain TDM metrics overview
 #' tdm_metrics(out$tdm)
-#' }
 #' @keywords internal
 tdm_metrics <- function(tdm = NULL) {
   is_cr_tdm_df(tdm)
diff --git a/R/report.R b/R/report.R
index b6296523..b7e3f277 100644
--- a/R/report.R
+++ b/R/report.R
@@ -41,7 +41,9 @@ draft_report <- function(lang = mc_langs, ...) {
 #' @inheritDotParams rmarkdown::render
 #' @inheritParams mcControlsServer
 #' @export
-render_report <- function(dois = tu_dois(), translator = mc_translator(), ...) {
+render_report <- function(dois = doi_examples$good,
+                          translator = mc_translator(),
+                          ...) {
   stopifnot(!shiny::is.reactive(dois))
   checkmate::assert_vector(dois, min.len = 1, null.ok = FALSE)
   dois <- biblids::as_doi(dois)
@@ -58,7 +60,7 @@ render_report <- function(dois = tu_dois(), translator = mc_translator(), ...) {
 #' @noRd
 knit_child_report <- function(...) {
   # knit_child does not know params, so these have to be in env
-  params <<- list(dois = tu_dois())
+  params <<- list(dois = doi_examples$good)
   res <- knitr::knit_child(
     path_report_rmd(...),
     quiet = TRUE
diff --git a/inst/extdata/dois/many.txt b/inst/extdata/dois/many.txt
index 68ab9dea..3f1f7b9d 100644
--- a/inst/extdata/dois/many.txt
+++ b/inst/extdata/dois/many.txt
@@ -1583,4 +1583,6 @@
 10.2478/s11756-020-00474-2
 10.2478/s11756-020-00475-1
 10.3758/s13415-018-00647-2
-10.4153/cjm-2017-045-0
\ No newline at end of file
+10.4153/cjm-2017-045-0
+10.5194/wes-5-1375-2020
+10.5194/wes-5-721-2020
diff --git a/inst/extdata/dois/tu.txt b/inst/extdata/dois/tu.txt
index 68f8453c..75512a40 100644
--- a/inst/extdata/dois/tu.txt
+++ b/inst/extdata/dois/tu.txt
@@ -1,4 +1,3 @@
-10.5194/wes-2019-70
 10.1038/s41598-020-57429-5
 10.3389/fmech.2019.00073
 10.1038/s41598-020-62245-y
@@ -51,9 +50,7 @@
 10.3389/fmech.2020.00039
 10.3389/fmicb.2020.01284
 10.1016/j.envint.2020.105867
-10.5194/wes-5-819-202
 10.1016/j.egyr.2020.06.028
-10.5194/wes-5-721-2020
 10.1186/s12939-020-01191-7
 10.3390/en13081993
 10.3390/su12083394
@@ -81,7 +78,6 @@
 10.3389/fmech.2020.00057
 10.1088/1748-9326/aba2fe
 10.5194/hess-24-3835-2020
-10.1039/D0RA05997H
 10.3389/fbioe.2020.00854
 10.3389/fnins.2020.00795
 10.3389/fmech.2020.00069
@@ -120,12 +116,10 @@
 10.3390/recycling5030019
 10.3390/mi11090866
 10.3390/en13205348
-10.3389/fmech.2020.566440/full
 10.1088/1748-9326/abbd63
 10.3390/su12197984
 10.5194/gmd-13-4435-2020
 10.36900/suburban.v8i3.523
-10.5194/wes-5-1375-2020
 10.1002/ejlt.202000213
 10.1002/cbic.202000257
 10.1002/adfm.202007294
diff --git a/inst/rmarkdown/templates/bericht/skeleton/skeleton.Rmd b/inst/rmarkdown/templates/bericht/skeleton/skeleton.Rmd
index eb0d7945..4d04e340 100644
--- a/inst/rmarkdown/templates/bericht/skeleton/skeleton.Rmd
+++ b/inst/rmarkdown/templates/bericht/skeleton/skeleton.Rmd
@@ -2,7 +2,7 @@
 output: blastula::blastula_email
 title: "Metacheck Bericht"
 params:
-  dois: !r metacheck:::tu_dois()
+  dois: !r metacheck::doi_examples$good
   translator: !r metacheck::mc_translator()
   session_id: NULL
 ---
diff --git a/inst/rmarkdown/templates/report/skeleton/skeleton.Rmd b/inst/rmarkdown/templates/report/skeleton/skeleton.Rmd
index c9326cc7..23a09184 100644
--- a/inst/rmarkdown/templates/report/skeleton/skeleton.Rmd
+++ b/inst/rmarkdown/templates/report/skeleton/skeleton.Rmd
@@ -2,7 +2,7 @@
 output: blastula::blastula_email
 title: "Metacheck Report"
 params:
-  dois: !r metacheck:::tu_dois()
+  dois: !r metacheck::doi_examples$good
   translator: !r metacheck::mc_translator()
   session_id: NULL
 ---
diff --git a/man/cc.Rd b/man/cc.Rd
new file mode 100644
index 00000000..7e032199
--- /dev/null
+++ b/man/cc.Rd
@@ -0,0 +1,54 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/metrics_cc.R
+\name{cc}
+\alias{cc}
+\alias{cc_metrics}
+\alias{cc_compliance_metrics}
+\title{Diagnose Creative Commons Licensing}
+\usage{
+cc_metrics(cc_license_check = NULL)
+
+cc_compliance_metrics(cc_license_check = NULL)
+}
+\arguments{
+\item{cc_license_check}{tibble, result from \code{\link[=license_check]{license_check()}}}
+}
+\description{
+Diagnose Creative Commons Licensing
+}
+\section{Related Functions and Methods}{
+\subsection{Functions}{
+\itemize{
+\item \code{cc_metrics}: Presents normalised CC licence variants.
+For example, \code{BY} (absolute and relative).
+}
+\itemize{
+\item \code{cc_compliance_metrics}: Presents the result of the CC compliance check.
+Absolute and relative normalised CC licence variants.
+}}}
+
+\examples{
+# obtain metadata from Crossref API
+req <- get_cr_md(doi_examples$good)
+
+# check article-level compliance
+out <- cr_compliance_overview(req)
+# obtain CC variants metrics
+cc_metrics(out$cc_license_check)
+# Obtain cc compliance check resutls metrics
+cc_compliance_metrics(out$cc_license_check)
+}
+\seealso{
+\code{\link[=license_check]{license_check()}}
+
+Other transform: 
+\code{\link{cr_compliance_overview}()},
+\code{\link{cr_funder_df}()},
+\code{\link{cr_has_orcid}()},
+\code{\link{cr_tdm_df}()},
+\code{\link{get_license_md}()},
+\code{\link{license_check}()},
+\code{\link{vor_issue}()}
+}
+\concept{transform}
+\keyword{internal}
diff --git a/man/cc_compliance_metrics.Rd b/man/cc_compliance_metrics.Rd
deleted file mode 100644
index a53300e6..00000000
--- a/man/cc_compliance_metrics.Rd
+++ /dev/null
@@ -1,29 +0,0 @@
-% Generated by roxygen2: do not edit by hand
-% Please edit documentation in R/metrics_cc.R
-\name{cc_compliance_metrics}
-\alias{cc_compliance_metrics}
-\title{CC compliance metrics overview}
-\usage{
-cc_compliance_metrics(cc_license_check = NULL)
-}
-\arguments{
-\item{cc_license_check}{tibble, result from \code{\link[=license_check]{license_check()}}}
-}
-\description{
-Presents the result of the CC compliance check (absolute and relative)
-}
-\examples{
-# Workflow:
-# First, obtain metadata from Crossref API
-req <- get_cr_md(tu_dois()[7:10])
-
-# Then, check article-level compliance
-out <- cr_compliance_overview(req)
-
-# Obtain CC compliance check resutls metrics
-cc_compliance_metrics(out$cc_license_check)
-}
-\seealso{
-\code{\link[=license_check]{license_check()}}
-}
-\keyword{internal}
diff --git a/man/cc_metrics.Rd b/man/cc_metrics.Rd
deleted file mode 100644
index d61f00f6..00000000
--- a/man/cc_metrics.Rd
+++ /dev/null
@@ -1,32 +0,0 @@
-% Generated by roxygen2: do not edit by hand
-% Please edit documentation in R/metrics_cc.R
-\name{cc_metrics}
-\alias{cc_metrics}
-\title{CC license variants metrics overview}
-\usage{
-cc_metrics(cc_license_check = NULL)
-}
-\arguments{
-\item{cc_license_check}{tibble, result from \code{\link[=license_check]{license_check()}}}
-}
-\description{
-Presents normalised CC licence variants like BY (absolute and relative)
-}
-\examples{
-\dontrun{
-my_dois <- c("10.5194/wes-2019-70", "10.1038/s41598-020-57429-5",
-  "10.3389/fmech.2019.00073", "10.1038/s41598-020-62245-y",
-  "10.1109/JLT.2019.2961931")
-
-# Workflow:
-# First, obtain metadata from Crossref API
-req <- get_cr_md(my_dois)
-
-# Then, check article-level compliance
-out <- cr_compliance_overview(req)
-
-# Obtain CC variants metrics
-cc_metrics(out$cc_license_check)
-}
-}
-\keyword{internal}
diff --git a/man/cr_compliance_overview.Rd b/man/cr_compliance_overview.Rd
index 32d44a58..b6245d1b 100644
--- a/man/cr_compliance_overview.Rd
+++ b/man/cr_compliance_overview.Rd
@@ -14,6 +14,7 @@ Get compliance overview
 }
 \seealso{
 Other transform: 
+\code{\link{cc}},
 \code{\link{cr_funder_df}()},
 \code{\link{cr_has_orcid}()},
 \code{\link{cr_tdm_df}()},
diff --git a/man/cr_funder_df.Rd b/man/cr_funder_df.Rd
index d8c477b1..1f0c1955 100644
--- a/man/cr_funder_df.Rd
+++ b/man/cr_funder_df.Rd
@@ -14,6 +14,7 @@ Get funder list from Crossref metadata
 }
 \seealso{
 Other transform: 
+\code{\link{cc}},
 \code{\link{cr_compliance_overview}()},
 \code{\link{cr_has_orcid}()},
 \code{\link{cr_tdm_df}()},
diff --git a/man/cr_has_orcid.Rd b/man/cr_has_orcid.Rd
index 27355459..86d2e813 100644
--- a/man/cr_has_orcid.Rd
+++ b/man/cr_has_orcid.Rd
@@ -14,6 +14,7 @@ Check for ORCIDs
 }
 \seealso{
 Other transform: 
+\code{\link{cc}},
 \code{\link{cr_compliance_overview}()},
 \code{\link{cr_funder_df}()},
 \code{\link{cr_tdm_df}()},
diff --git a/man/cr_tdm_df.Rd b/man/cr_tdm_df.Rd
index 66289c0c..ad4f0276 100644
--- a/man/cr_tdm_df.Rd
+++ b/man/cr_tdm_df.Rd
@@ -14,6 +14,7 @@ Unnest TDM information for version-of-records from Crossref metadata
 }
 \seealso{
 Other transform: 
+\code{\link{cc}},
 \code{\link{cr_compliance_overview}()},
 \code{\link{cr_funder_df}()},
 \code{\link{cr_has_orcid}()},
diff --git a/man/doi_examples.Rd b/man/doi_examples.Rd
new file mode 100644
index 00000000..52dbb056
--- /dev/null
+++ b/man/doi_examples.Rd
@@ -0,0 +1,27 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/data.R
+\docType{data}
+\name{doi_examples}
+\alias{doi_examples}
+\title{DOIs included in the package for testing and illustration}
+\format{
+A list of \code{\link[biblids:doi]{biblids::doi()}} vectors, including:
+\itemize{
+\item \code{good}: Guaranteed to work (all are \code{\link[=is_metacheckable]{is_metacheckable()}}).
+\item \code{many}: Long list of DOIs.
+\item \code{weird}: Troublesome DOIs.
+\item \code{biblids}: \code{\link[biblids:doi_examples]{biblids::doi_examples()}}
+}
+}
+\usage{
+doi_examples
+}
+\description{
+DOIs included in the package for testing and illustration
+}
+\examples{
+doi_examples$good
+
+}
+\concept{data}
+\keyword{datasets}
diff --git a/man/email.Rd b/man/email.Rd
index bc589bff..de9d070d 100644
--- a/man/email.Rd
+++ b/man/email.Rd
@@ -15,7 +15,7 @@ mc_compose_email(translator = mc_translator(), ...)
 mc_compose_email_outer(body = "Lorem", translator = mc_translator())
 
 mc_render_email(
-  dois = tu_dois()[1:10],
+  dois = doi_examples$good[1:10],
   translator = mc_translator(),
   session_id = NULL,
   ...
diff --git a/man/funder_metrics.Rd b/man/funder_metrics.Rd
index c483f3be..aeeae54f 100644
--- a/man/funder_metrics.Rd
+++ b/man/funder_metrics.Rd
@@ -19,20 +19,13 @@ Relative number is calculated by the number of checked articles.
 Articles without funder information are tagged as "No funder links found".
 }
 \examples{
-\dontrun{
-## Some DOIs from OA articles
-my_dois <- c("10.5194/wes-2019-70", "10.1038/s41598-020-57429-5",
-  "10.3389/fmech.2019.00073", "10.1038/s41598-020-62245-y",
-  "10.1109/JLT.2019.2961931")
-
-# Workflow:
 # First, obtain metadata from Crossref API
-req <- get_cr_md(my_dois)
+req <- get_cr_md(doi_examples$good)
 
 # Then, check article-level compliance
+out <- cr_compliance_overview(req)
 
 # Obtain funder metrics overview
 funder_metrics(out$funder_info)
 }
-}
 \keyword{internal}
diff --git a/man/get_license_md.Rd b/man/get_license_md.Rd
index b9c46283..7bd154ff 100644
--- a/man/get_license_md.Rd
+++ b/man/get_license_md.Rd
@@ -14,6 +14,7 @@ Extract and normalize license info from Crossref metadata
 }
 \seealso{
 Other transform: 
+\code{\link{cc}},
 \code{\link{cr_compliance_overview}()},
 \code{\link{cr_funder_df}()},
 \code{\link{cr_has_orcid}()},
diff --git a/man/license_check.Rd b/man/license_check.Rd
index a82cc71a..c82170ca 100644
--- a/man/license_check.Rd
+++ b/man/license_check.Rd
@@ -17,6 +17,7 @@ by the license date.
 }
 \seealso{
 Other transform: 
+\code{\link{cc}},
 \code{\link{cr_compliance_overview}()},
 \code{\link{cr_funder_df}()},
 \code{\link{cr_has_orcid}()},
diff --git a/man/metacheck-package.Rd b/man/metacheck-package.Rd
index 12a8f35f..89497d57 100644
--- a/man/metacheck-package.Rd
+++ b/man/metacheck-package.Rd
@@ -1,5 +1,5 @@
 % Generated by roxygen2: do not edit by hand
-% Please edit documentation in R/metacheck_package.R
+% Please edit documentation in R/metacheck.R
 \docType{package}
 \name{metacheck-package}
 \alias{metacheck}
diff --git a/man/metrics_overview.Rd b/man/metrics_overview.Rd
index ef2728a7..31f838ba 100644
--- a/man/metrics_overview.Rd
+++ b/man/metrics_overview.Rd
@@ -25,20 +25,13 @@ The following metrics are presented (absolute and relative):
 }
 }
 \examples{
-\dontrun{
-## Some DOIs from OA articles
-my_dois <- c("10.5194/wes-2019-70", "10.1038/s41598-020-57429-5",
-  "10.3389/fmech.2019.00073", "10.1038/s41598-020-62245-y",
-  "10.1109/JLT.2019.2961931")
-
-# Workflow:
 # First, obtain metadata from Crossref API
-req <- get_cr_md(my_dois)
+req <- get_cr_md(doi_examples$good)
 
 # Then, check article-level compliance
+out <- cr_compliance_overview(req)
 
 # Finally, obtain compliance metrics overview
-metrics_overview(out)
-}
+metrics_overview(out$cr_overview)
 }
 \keyword{internal}
diff --git a/man/report.Rd b/man/report.Rd
index eac261ee..c3f84875 100644
--- a/man/report.Rd
+++ b/man/report.Rd
@@ -8,7 +8,7 @@
 \usage{
 draft_report(lang = mc_langs, ...)
 
-render_report(dois = tu_dois(), translator = mc_translator(), ...)
+render_report(dois = doi_examples$good, translator = mc_translator(), ...)
 }
 \arguments{
 \item{lang}{Character scalar giving the anguage of the report.
diff --git a/man/tdm_metrics.Rd b/man/tdm_metrics.Rd
index 5bbed2f2..f361b14e 100644
--- a/man/tdm_metrics.Rd
+++ b/man/tdm_metrics.Rd
@@ -21,20 +21,13 @@ Articles without compliant TDM information are tagged as
 "No TDM links for version-of-records".
 }
 \examples{
-\dontrun{
-## Some DOIs from OA articles
-my_dois <- c("10.5194/wes-2019-70", "10.1038/s41598-020-57429-5",
-  "10.3389/fmech.2019.00073", "10.1038/s41598-020-62245-y",
-  "10.1109/JLT.2019.2961931")
-
-# Workflow:
 # First, obtain metadata from Crossref API
-req <- get_cr_md(my_dois)
+req <- get_cr_md(doi_examples$good)
 
 # Then, check article-level compliance
+out <- cr_compliance_overview(req)
 
 # Finally, obtain TDM metrics overview
 tdm_metrics(out$tdm)
 }
-}
 \keyword{internal}
diff --git a/man/tu_dois.Rd b/man/tu_dois.Rd
deleted file mode 100644
index 836bfe99..00000000
--- a/man/tu_dois.Rd
+++ /dev/null
@@ -1,12 +0,0 @@
-% Generated by roxygen2: do not edit by hand
-% Please edit documentation in R/data.R
-\name{tu_dois}
-\alias{tu_dois}
-\title{Some DOIs for testing}
-\usage{
-tu_dois()
-}
-\description{
-Some DOIs for testing
-}
-\keyword{internal}
diff --git a/man/vor_issue.Rd b/man/vor_issue.Rd
index 7efeced0..7b14c888 100644
--- a/man/vor_issue.Rd
+++ b/man/vor_issue.Rd
@@ -17,6 +17,7 @@ record and must be valid without delay.
 }
 \seealso{
 Other transform: 
+\code{\link{cc}},
 \code{\link{cr_compliance_overview}()},
 \code{\link{cr_funder_df}()},
 \code{\link{cr_has_orcid}()},
diff --git a/pkgdown/_pkgdown.yml b/pkgdown/_pkgdown.yml
index 854b0382..08dc6be6 100644
--- a/pkgdown/_pkgdown.yml
+++ b/pkgdown/_pkgdown.yml
@@ -24,7 +24,7 @@ reference:
 - title: Data
   desc: Data objects and queries
 - contents:
-  - has_concept("doi")
+  - has_concept("data")
 - title: Import
   desc: Read in data
 - contents:
diff --git a/tests/testthat/_snaps/metrics_indexing_status.md b/tests/testthat/_snaps/metrics_indexing_status.md
index e8e6b973..f2e2043a 100644
--- a/tests/testthat/_snaps/metrics_indexing_status.md
+++ b/tests/testthat/_snaps/metrics_indexing_status.md
@@ -11,7 +11,7 @@
         "row.names": {
           "type": "integer",
           "attributes": {},
-          "value": [1, 2, 3, 4, 5]
+          "value": [1, 2, 3, 4]
         },
         "names": {
           "type": "character",
@@ -26,7 +26,7 @@
             "levels": {
               "type": "character",
               "attributes": {},
-              "value": ["Collaborative Research Center", "Deutsche Forschungsgemeinschaft", "Fundação de Amparo à Pesquisa do Estado de São Paulo", "Tomsk State University", "No funding info"]
+              "value": ["Collaborative Research Center", "Deutsche Forschungsgemeinschaft", "Fundação de Amparo à Pesquisa do Estado de São Paulo", "No funding info"]
             },
             "class": {
               "type": "character",
@@ -34,17 +34,17 @@
               "value": ["factor"]
             }
           },
-          "value": [1, 2, 3, 4, 5]
+          "value": [1, 2, 3, 4]
         },
         {
           "type": "integer",
           "attributes": {},
-          "value": [1, 1, 1, 1, 2]
+          "value": [1, 1, 1, 3]
         },
         {
           "type": "double",
           "attributes": {},
-          "value": [20, 20, 20, 20, 40]
+          "value": [20, 20, 20, 60]
         }
       ]
     }
diff --git a/tests/testthat/_snaps/pretest.md b/tests/testthat/_snaps/pretest.md
index 4ce360a6..c24d20ea 100644
--- a/tests/testthat/_snaps/pretest.md
+++ b/tests/testthat/_snaps/pretest.md
@@ -11,7 +11,7 @@
         "row.names": {
           "type": "integer",
           "attributes": {},
-          "value": [1, 2, 3, 4, 5, 6, 7, 8]
+          "value": [1, 2, 3, 4, 5, 6, 7, 8, 9]
         },
         "names": {
           "type": "character",
@@ -23,37 +23,37 @@
         {
           "type": "logical",
           "attributes": {},
-          "value": [true, false, true, true, true, true, true, true]
+          "value": [true, false, true, true, true, true, true, true, true]
         },
         {
           "type": "logical",
           "attributes": {},
-          "value": [true, null, false, true, true, true, true, true]
+          "value": [true, null, false, true, true, true, true, true, true]
         },
         {
           "type": "logical",
           "attributes": {},
-          "value": [true, null, null, true, true, false, false, false]
+          "value": [true, null, null, true, true, false, false, false, false]
         },
         {
           "type": "logical",
           "attributes": {},
-          "value": [true, null, null, true, true, null, null, null]
+          "value": [true, null, null, true, true, null, null, null, null]
         },
         {
           "type": "logical",
           "attributes": {},
-          "value": [false, null, null, true, false, null, null, null]
+          "value": [false, null, null, true, false, null, null, null, null]
         },
         {
           "type": "logical",
           "attributes": {},
-          "value": [null, null, null, true, null, null, null, null]
+          "value": [null, null, null, true, null, null, null, null, null]
         },
         {
           "type": "logical",
           "attributes": {},
-          "value": [null, null, null, true, null, null, null, null]
+          "value": [null, null, null, true, null, null, null, null, null]
         }
       ]
     }
@@ -63,7 +63,7 @@
     {
       "type": "logical",
       "attributes": {},
-      "value": [false, false, false, true, false, false, true, true]
+      "value": [false, false, false, true, false, false, true, true, false]
     }
 
 # DOI acceptability is reported
@@ -77,6 +77,6 @@
           "value": ["glue", "character"]
         }
       },
-      "value": ["- 7 (88%) thereof fulfill the criterion `not_missing` (**1** dropped)\n- 6 (86%) thereof fulfill the criterion `unique` (**1** dropped)\n- 6 (100%) thereof fulfill the criterion `within_limits` (**0** dropped)\n- 6 (100%) thereof fulfill the criterion `doi_org_found` (**0** dropped)\n- 3 (50%) thereof fulfill the criterion `from_cr` (**3** dropped)\n- 3 (100%) thereof fulfill the criterion `cr_md` (**0** dropped)\n- 3 (100%) thereof fulfill the criterion `article` (**0** dropped)"]
+      "value": ["- 8 (89%) thereof fulfill the criterion `not_missing` (**1** dropped)\n- 7 (88%) thereof fulfill the criterion `unique` (**1** dropped)\n- 7 (100%) thereof fulfill the criterion `within_limits` (**0** dropped)\n- 6 (86%) thereof fulfill the criterion `doi_org_found` (**1** dropped)\n- 3 (50%) thereof fulfill the criterion `from_cr` (**3** dropped)\n- 3 (100%) thereof fulfill the criterion `cr_md` (**0** dropped)\n- 3 (100%) thereof fulfill the criterion `article` (**0** dropped)"]
     }
 
diff --git a/tests/testthat/test-data.R b/tests/testthat/test-data.R
new file mode 100644
index 00000000..abebe256
--- /dev/null
+++ b/tests/testthat/test-data.R
@@ -0,0 +1,3 @@
+test_that("Good example DOIs are all metacheckable", {
+  expect_true(all(is_metacheckable(doi_examples$good)))
+})
diff --git a/tests/testthat/test-import.R b/tests/testthat/test-import.R
index dc2bde5e..0f7501ff 100644
--- a/tests/testthat/test-import.R
+++ b/tests/testthat/test-import.R
@@ -1,7 +1,7 @@
 # wrapped cr api calls ====
 
 skip_if_offline()
-dois <- tu_dois()[2:5]
+dois <- doi_examples$good[2:5]
 
 test_that("Crossref metadata can be read in", {
   # testthat does not seem to know about vctrs equality
@@ -24,8 +24,8 @@ test_that("cr_works2 throws error on bad DOIs", {
 })
 
 test_that("cr_works accepts only one doi (lonely)", {
-  expect_error(lonely_cr_works(dois[2:3]))
-  expect_type(lonely_cr_works(dois[2]), "list")
+  expect_error(lonely_cr_works(as.character(dois[2:3])))
+  expect_type(lonely_cr_works(as.character(dois[2])), "list")
 })
 
 test_that("cr_works captures warnings (quiet)", {
@@ -34,14 +34,14 @@ test_that("cr_works captures warnings (quiet)", {
     regexp = "404"
   )
   expect_equal(
-    quiet_cr_works(dois[2])$warnings,
+    quiet_cr_works(as.character(dois[2]))$warnings,
     character()
   )
 })
 
 test_that("cr_works fails on bad output or warning (prickly)", {
   expect_error(prickly_cr_works("10.1000/foo"))
-  expect_type(prickly_cr_works(dois[2]), "list")
+  expect_type(prickly_cr_works(as.character(dois[2])), "list")
 })
 
 test_that("cr_works retries on bad output (insistently)", {
@@ -52,7 +52,8 @@ test_that("cr_works retries on bad output (insistently)", {
 })
 
 test_that("cr_works uses cache (memoised)", {
-  random_doi <- as.character(sample(dois_many(), size = 1))
+  skip("Test is not deterministic")
+  random_doi <- as.character(sample(doi_examples$many, size = 1))
   before <- system.time(memoised_cr_works(random_doi))["elapsed"]
   after <- system.time(memoised_cr_works(random_doi))["elapsed"]
   expect_lt(after, before / 10L)
@@ -60,7 +61,9 @@ test_that("cr_works uses cache (memoised)", {
 
 test_that("cr_works_field can find fields", {
   expect_true(
-    biblids::as_doi(cr_works_field(dois[1], "doi")) == biblids::as_doi(dois[1])
+    biblids::as_doi(
+      cr_works_field(as.character(dois[1]), "doi")
+    ) == biblids::as_doi(dois[1])
   )
 })
 
@@ -73,7 +76,7 @@ test_that("cr_works_field defaults to NA for errors", {
 
 test_that("many cr_works_fields can be retrieved", {
   expect_equal(
-    looped_possibly_cr_works_field(c("10.1000/foo", dois[1]), "doi"),
-    c(NA, dois[1])
+    looped_possibly_cr_works_field(c("10.1000/foo", as.character(dois[1])), "doi"),
+    c(NA, as.character(dois[1]))
   )
 })
diff --git a/tests/testthat/test-metrics_indexing_status.R b/tests/testthat/test-metrics_indexing_status.R
index 5086bac3..0a3e57ab 100644
--- a/tests/testthat/test-metrics_indexing_status.R
+++ b/tests/testthat/test-metrics_indexing_status.R
@@ -1,6 +1,6 @@
 skip_if_offline()
 
-test_dois <- tu_dois()[2:6]
+test_dois <- doi_examples$good[2:6]
 req <- get_cr_md(test_dois)
 out <- cr_compliance_overview(req)
 
diff --git a/tests/testthat/test-pretest.R b/tests/testthat/test-pretest.R
index 05754521..c3e82ab3 100644
--- a/tests/testthat/test-pretest.R
+++ b/tests/testthat/test-pretest.R
@@ -2,19 +2,19 @@
 skip_if_offline()
 
 test_that("Acceptable DOIs are filtered", {
-  expect_snapshot_value2(tabulate_metacheckable(dois_weird(), limit = 3))
-  expect_snapshot_value2(is_metacheckable(dois_weird(), limit = 3))
+  expect_snapshot_value2(tabulate_metacheckable(doi_examples$weird, limit = 3))
+  expect_snapshot_value2(is_metacheckable(doi_examples$weird, limit = 3))
 })
 
 test_that("Acceptable DOIs can be asserted", {
-  expect_error(assert_metacheckable(dois_weird()))
+  expect_error(assert_metacheckable(doi_examples$weird))
   expect_invisible(
-    assert_metacheckable(dois_weird()[is_metacheckable(dois_weird())])
+    assert_metacheckable(doi_examples$weird[is_metacheckable(doi_examples$weird)])
   )
 })
 
 test_that("DOI acceptability is reported", {
-  expect_snapshot_value2(report_metacheckable(dois_weird()))
+  expect_snapshot_value2(report_metacheckable(doi_examples$weird))
 })
 
 # custom predicates ====
diff --git a/vignettes/bericht.Rmd b/vignettes/bericht.Rmd
index 007c0c24..1d43f431 100644
--- a/vignettes/bericht.Rmd
+++ b/vignettes/bericht.Rmd
@@ -7,7 +7,7 @@ pkgdown:
 <!-- this file always has to be in sync with other language versions -->
 
 <div class="alert alert-warning" role="alert">
-  Dieses Ergebnis basiert auf den `tu_dois()` Beispieldaten im metacheck Paket.
+  Dieses Ergebnis basiert auf den [doi_examples$good] Beispieldaten im metacheck Paket.
 </div>
 
 ```{r, echo = FALSE, results = 'asis', message = FALSE}
diff --git a/vignettes/report.Rmd b/vignettes/report.Rmd
index 8efe655f..89aac4cf 100644
--- a/vignettes/report.Rmd
+++ b/vignettes/report.Rmd
@@ -7,7 +7,7 @@ pkgdown:
 <!-- this file always has to be in sync with other language versions -->
 
 <div class="alert alert-warning" role="alert">
-  This is an example report using the `tu_dois()` data, shipped with the package.
+  This is an example report using the [doi_examples$good] data, shipped with the package.
 </div>
 
 ```{r, echo = FALSE, results = 'asis', message = FALSE}