diff --git a/DESCRIPTION b/DESCRIPTION
index 01cbaa8a..abae0884 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -68,7 +68,8 @@ Suggests:
     spelling,
     testthat (>= 3.1.7),
     DT,
-    readr
+    readr,
+    withr
 VignetteBuilder: knitr
 Config/testthat/edition: 3
 Config/testthat/parallel: true
diff --git a/NAMESPACE b/NAMESPACE
index 68d7440d..24f1c45d 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -21,6 +21,8 @@ export(generate_code)
 export(generate_oak_id_vars)
 export(hardcode_ct)
 export(hardcode_no_ct)
+export(is_character)
+export(is_numeric)
 export(oak_id_vars)
 export(problems)
 export(read_ct_spec)
diff --git a/R/generate_code.R b/R/generate_code.R
index ad6a3d5e..9af3ecf0 100644
--- a/R/generate_code.R
+++ b/R/generate_code.R
@@ -75,7 +75,7 @@ is_numeric <- function(var_in) {
 #'
 #' @param var_in The variable to check.
 #'
-#' @return
+#' @return Logical indicating if the variable is character.
 #' @export
 #'
 is_character <- function(var_in) {
@@ -248,10 +248,9 @@ remove_last_pipe <- function(code_blocks) {
 #' @param spec The specification data frame.
 #' @param domain The SDTM domain to get the specification for.
 #'
-#' @return
+#' @return A tibble with the specification for the domain.
 #' @keywords internal
 #'
-#' @examples
 get_domain_spec <- function(spec, domain) {
   expected_columns <- c(
     "raw_dataset",
diff --git a/R/globals.R b/R/globals.R
index 9a2998a0..5297f336 100644
--- a/R/globals.R
+++ b/R/globals.R
@@ -1,4 +1,6 @@
 utils::globalVariables(c(
   "USUBJID", "VISIT", "dom_dt", "dom_tm", "ref_dt",
-  "ref_tm"
+  "ref_tm", "target_sdtm_domain", "target_sdtm_variable",
+  "mapping_algorithm", "entity_sub_algorithm", "entity_sub_algorithm",
+  "entity_sub_algorithm_temp", "condition_add_raw_dat", "raw_dataset"
 ))
diff --git a/man/cm_template_prefix.Rd b/man/cm_template_prefix.Rd
new file mode 100644
index 00000000..eb244d88
--- /dev/null
+++ b/man/cm_template_prefix.Rd
@@ -0,0 +1,16 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/generate_code.R
+\docType{data}
+\name{cm_template_prefix}
+\alias{cm_template_prefix}
+\title{The template suffix for the cm code}
+\format{
+An object of class \code{glue} (inherits from \code{character}) of length 1.
+}
+\usage{
+cm_template_prefix
+}
+\description{
+The template suffix for the cm code
+}
+\keyword{internal}
diff --git a/man/expected_columns.Rd b/man/expected_columns.Rd
index f4bdb453..781739d2 100644
--- a/man/expected_columns.Rd
+++ b/man/expected_columns.Rd
@@ -5,7 +5,7 @@
 \alias{expected_columns}
 \title{Expected columns in the specification file}
 \format{
-An object of class \code{character} of length 47.
+An object of class \code{character} of length 50.
 }
 \usage{
 expected_columns
diff --git a/man/generate_code.Rd b/man/generate_code.Rd
index 6efd45e0..ca651ce6 100644
--- a/man/generate_code.Rd
+++ b/man/generate_code.Rd
@@ -25,7 +25,6 @@ more parameters will be placed on a single line and code will be shorter.
 See the examples for more details.
 }
 \examples{
-
 \dontrun{
 spec <- read_spec("cm_sdtm_oak_spec_cdash.csv")
 domain <- "cm"
diff --git a/man/get_domain_spec.Rd b/man/get_domain_spec.Rd
index 976589a6..382c9650 100644
--- a/man/get_domain_spec.Rd
+++ b/man/get_domain_spec.Rd
@@ -11,6 +11,9 @@ get_domain_spec(spec, domain)
 
 \item{domain}{The SDTM domain to get the specification for.}
 }
+\value{
+A tibble with the specification for the domain.
+}
 \description{
 Get the specification for a domain and modify it
 }
diff --git a/man/is_character.Rd b/man/is_character.Rd
new file mode 100644
index 00000000..3f805162
--- /dev/null
+++ b/man/is_character.Rd
@@ -0,0 +1,17 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/generate_code.R
+\name{is_character}
+\alias{is_character}
+\title{Check if a variable is character}
+\usage{
+is_character(var_in)
+}
+\arguments{
+\item{var_in}{The variable to check.}
+}
+\value{
+Logical indicating if the variable is character.
+}
+\description{
+Check if a variable is character
+}
diff --git a/man/is_numeric.Rd b/man/is_numeric.Rd
new file mode 100644
index 00000000..18bd359a
--- /dev/null
+++ b/man/is_numeric.Rd
@@ -0,0 +1,17 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/generate_code.R
+\name{is_numeric}
+\alias{is_numeric}
+\title{Check if a variable is character}
+\usage{
+is_numeric(var_in)
+}
+\arguments{
+\item{var_in}{The variable to check.}
+}
+\value{
+Logical indicating if the variable is character.
+}
+\description{
+Check if a variable is character
+}
diff --git a/man/parse_into_c_call.Rd b/man/parse_into_c_call.Rd
new file mode 100644
index 00000000..77340daa
--- /dev/null
+++ b/man/parse_into_c_call.Rd
@@ -0,0 +1,28 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/generate_code.R
+\name{parse_into_c_call}
+\alias{parse_into_c_call}
+\title{This function converts comma separated string into a character vector}
+\usage{
+parse_into_c_call(str_in)
+}
+\arguments{
+\item{string}{A string with comma separated values.}
+}
+\value{
+A character vector.
+}
+\description{
+This function converts comma separated string into a character vector
+}
+\examples{
+\dontrun{
+str_in <- "a, b, c"
+parse_into_c_call("a, b, c")
+
+str_in <- NA_character_
+parse_into_c_call(str_in)
+}
+
+}
+\keyword{internal}
diff --git a/man/read_spec.Rd b/man/read_spec.Rd
index 4dd18f75..3f4948ad 100644
--- a/man/read_spec.Rd
+++ b/man/read_spec.Rd
@@ -16,7 +16,6 @@ A tibble with the specification.
 Read the specification file
 }
 \examples{
-
 \dontrun{
 file <- "cm_sdtm_oak_spec_cdash.csv"
 observed <- read_spec(file)