schema.md

@@ -24,6 +24,8 @@ The RECAP Preterm data schema is used to classify cohort variables within the da
 
 ## Main Schema
 
+The main RECAP data schema allows researchers to orgnise variables by the topic of interest. This schema is made up of 14 modules.
+
 [Administrative Information & Identifiers](Administrative Information & Identifiers)\
 [Antenatal & Birth](Antenatal & Birth)\
 [Biomarkers & Laboratory Analyses](Biomarkers & Laboratory Analyses)\
@@ -40,6 +42,9 @@ The RECAP Preterm data schema is used to classify cohort variables within the da
 [Socioeconomic & Demographic](Socioeconomic & Demographic)
 
 ## Instrument Schema
+
+Standardised instruments and other commonly used data collection tools have been organised within the RECAP Instrument Schema. Implementation of this schema within the RECAP data platform allows researchers to search by the instrument of interest and select appropriate variables collected using the instrument.
+
 [Education](Instruments#education)\
 [Health](Instruments#health)\
 [Health Behaviours](Instruments#health-behaviours)\
@@ -49,6 +54,9 @@ The RECAP Preterm data schema is used to classify cohort variables within the da
 [Social](Instruments#social)
 
 ## Target, Source, and Mode
+
+Target Source and Mode Schema allows researchers to classify variables according to the target of the variable (who/what the information is about), source (who/what provided the information), and mode (the mode of data collection).
+
 [Target](Target Source Mode#target)\
 [Source](Target Source Mode#source)\
 [Mode](Target Source Mode#mode)