diff --git a/R/modify.table.R b/R/modify.table.R
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+++ b/R/modify.table.R
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+Modify Tabular Data Dictionaries
+#'
+#' Amends a tabular data dictionary, including adding/updating attributes and domains.
+#' @param x  Data frame of a tabular data dictionary.
+#' @param how Character string matching one of the modification options: see ‘Details’.
+#' @param codeName Conditionally optional character string. Name of the attribute to add or modify.
+#' @param allowNull Optional logical (TRUE/FALSE). Whether null values are permissible for the attribute indicated with 'codeName'.
+#' @param dataType Optional character string. Datatype of the attribute indicated with 'codeName'.
+#' @param definition Optional character string. Definition of the attribute indicated with 'codeName'.
+#' @param units Optional character string. Unit-of-measure for the attribute indicated with 'codeName'.
+#' @param unitsResolution Optional numeric. Smallest increment of measurement for the attribute indicated with 'codeName'.
+#' @param isCaseSensitive Optional logical (TRUE/FALSE). Whether case-sensitive ASCII encoding is used for the attribute indicated with 'codeName'.
+#' @param missingValue Optional character string. Code representing missing values of the attribute indicated with 'codeName'.
+#' @param minValue Optional character string. Minimum value permissible for the attribute indicated with 'codeName'.
+#' @param maxValue Optional character string. Maximum value permissible for the attribute indicated with 'codeName'.
+#' @param fieldWidth Optional integer. Field width of the attribute indicated with 'codeName'.
+#' @param domainId Conditionally optional character string. Universally Unique Identifier (UUID) of the attribute or domain indicated with 'codeName' or domainName', respectively.
+#' @param domainName Conditionally optional character string. Name of the domain to add or modify.
+#' @param domainDescription Optional character string. Description of the domain indicated with 'domainName'.
+#' @param domainItem_value Optional character string. Value of the domain item (entry value) indicated with 'domainName'.
+#' @param domainItem_name Optional character string. Name of the domain item (entry value) indicated with 'domainItem_value'.
+#' @param domainItem_definition Optional character string. Definition of the domain item (entry value) indicated with 'domainItem_value'.
+#' @param quiet Optional logical. Default=FALSE. If TRUE, function runs with minimum input required and does not print revisions for approval.
+#' @return Returns a modified data frame of the data dictionary.
+#' @keywords mdEditor, mdJSON, json, dictionary, metadata
+#' @seealso ```modify.table()```
+#' @export
+#' @examples
+#'
+
+
+
+modify.table <-
+  function(x,
+           how = c(
+             "add_attribute",
+             "add_domain",
+             "add_domainItem",
+             "update_attribute",
+             "update_domain",
+             "update_domainItem"
+           ),
+           codeName = "",
+           allowNull = "",
+           dataType = "",
+           definition = "",
+           units = "",
+           unitsResolution = "",
+           isCaseSensitive = "",
+           missingValue = "",
+           minValue = "",
+           maxValue = "",
+           fieldWidth = "",
+           domainId = "",
+           domainName = "",
+           domainDescription = "",
+           domainItem_value = "",
+           domainItem_name = "",
+           domainItem_definition = "",
+           quiet = FALSE) {
+    `%>%` <- magrittr::`%>%`
+
+
+
+    x.2 <- mdJSONdictio::build.mdJSON(x = x)
+
+
+
+    input.dxnry <- modify.mdJSON(
+      x.2 = ,
+      how = how,
+      codeName = codeName,
+      allowNull = allowNull,
+      dataType = dataType,
+      definition = definition,
+      units = units,
+      unitsResolution = unitsResolution,
+      isCaseSensitive = isCaseSensitive,
+      missingValue = missingValue,
+      minValue = minValue,
+      maxValue = maxValue,
+      fieldWidth = fieldWidth,
+      domainId = domainId,
+      domainName = domainName,
+      domainDescription = domainDescription,
+      domainItem_value = domainItem_value,
+      domainItem_name = domainItem_name,
+      domainItem_definition = domainItem_definition,
+      quiet = FALSE
+    )
+
+
+  }