Last obs before exposure flag and baseline flag

.lintr

@@ -23,6 +23,8 @@ linters: linters_with_defaults(
     redundant_ifelse_linter(),
     sprintf_linter(),
     strings_as_factors_linter(),
-    undesirable_function_linter(c(Sys.setenv = NA_character_, mapply = NA_character_))
+    undesirable_function_linter(c(Sys.setenv = NA_character_, mapply = NA_character_)),
+    object_name_linter = NULL,
+    object_usage_linter = NULL
   )
 encoding: "UTF-8"

NAMESPACE

@@ -13,9 +13,12 @@ export(create_iso8601)
 export(ct_map)
 export(ct_spec_example)
 export(ct_spec_vars)
+export(derive_blfl)
 export(derive_seq)
 export(derive_study_day)
 export(domain_example)
+export(dtc_datepart)
+export(dtc_timepart)
 export(fmt_cmp)
 export(hardcode_ct)
 export(hardcode_no_ct)