diff --git a/02_OBSERVATIONAL/OBSERVATIONAL_02_merge_inventory_metadata.R b/02_OBSERVATIONAL/OBSERVATIONAL_02_merge_inventory_metadata.R
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+## OBSERVATIONAL_02_merge_inventory_metadata.R
+## Date     : 2024/10/17
+## Author   : Thomas Obadia
+##
+## At the population inventory phase, many descriptors including 
+## GPS coordinates of houses were taken.
+## The subset of individuals enrolled in the observational study 
+## will make use of these metadata to link with epidemiological and 
+## clinical data such as lab results, malaria prevalence etc.
+##
+## This script will amend the data from the observational databases
+## with descriptors from the inventory databases, using the ID 
+## allocated at inventory phase.
+######################################################################
+
+
+
+
+
+######################################################################
+### SOURCE THE DATABASES
+######################################################################
+if (!exists("DATA_EXTRACT_IS_RECENT_OBS") || !DATA_EXTRACT_IS_RECENT_OBS) {
+  cat("Databases are outdated and will be dumped again.\n")
+  source("./01_INVENTORY/INVENTORY_02_list_all_inventory_participants.R")
+  source("./01_INVENTORY/INVENTORY_03_list_all_inventory_houses.R")
+  source("./02_OBSERVATIONAL/OBSERVATIONAL_01_dump_REDCap_database.R")
+}
+
+
+
+
+
+######################################################################
+### 
+######################################################################