-\dim_new:N \g_kivi_tab_pos_dim
-\dim_gset:Nn \g_kivi_tab_pos_dim {3.5ex}
-\dim_new:N \g_kivi_tab_id_dim
-\dim_gset:Nn \g_kivi_tab_id_dim {4em}
-\dim_new:N \g_kivi_tab_num_dim
-\dim_gset:Nn \g_kivi_tab_num_dim {5em}
-\dim_new:N \g_kivi_tab_price_dim
-\dim_gset:Nn \g_kivi_tab_price_dim {7em}
-\dim_new:N \g_kivi_tab_desc_dim
+\dim_new:N \l_kivi_tab_desc_dim
+\bool_new:N \l_kivi_col_desc_bool
+\bool_set_true:N \l_kivi_col_desc_bool
+
+\clist_map_inline:nn {pos, id, amount, price, pricetotal} {
+ \bool_new:c {l_kivi_col_#1_bool}
+ \dim_new:c {l_kivi_tab_#1_dim}
+ \keys_define:nn {kivi/PricingTable} {
+ #1 .choice:,
+ #1 / true .code:n = \bool_set_true:c {l_kivi_col_#1_bool},
+ #1 / false .code:n = \bool_set_false:c {l_kivi_col_#1_bool},
+ #1 /unknown .code:n = {\bool_set_true:c {l_kivi_col_#1_bool}\dim_set:cn {g_kivi_tab_#1_dim} {##1}},
+ #1 .default:n = true,
+ #1 .initial:n = true,
+ }
+}
+
+% set default values for colwidth
+\dim_set:Nn \l_kivi_tab_pos_dim {3.5ex}
+\dim_set:Nn \l_kivi_tab_id_dim {4em}
+\dim_set:Nn \l_kivi_tab_amount_dim {5em}
+\dim_set:Nn \l_kivi_tab_price_dim {7em}
+\dim_set:Nn \l_kivi_tab_pricetotal_dim {7em}