This schema document contains element declarations describing the whole data set and the data entities it contains. v0-1: Initial drafting from Substance Misuse Data Set Business Definition document dated 20130926 v0-2: Structure revised following peer review; updateStatus added for entire ClientReferral and for AssessmentDetails, TreatmentModalityDetails and TreatmentOutcomeProfileDetails; minor revisions to datatypes. v0-3: Split out Referral Details into seperate element. Allow non-key fields to be empty. v0-4: Changes to reflect Substance Misuse Data Set Business Definition 0.5 The ClientReferral element is the fundamental building block of the dataset as represented in XML. Each ClientReferral element provides new, additional or updated information about an instance of the end-to-end business process from referral to discharge that is illustrated in the Business Definition document. The mandatory elements of the ReferralDetails element provide key information for data collation by NWIS across successive returns. Each ClientReferral element has an update status as follows: "add" - new client referral; "update" - information concerning a client referral for which information has already been given in a previous return instance; "delete" - erroneous client referral to be removed from the cumulated dataset. The mandatory elements of ReferralDetails together form a key that is used to check for uniqueness of a client referral. A ClientReferral element with "add" or "update" may be followed (immediately or later in the return) by a ClientReferral with "update". The required elements of the ReferralDetails element provide the key information for data collation by NWIS across successive returns. The optional elements constitute Discharge details and are populated when information is available about the closure of the client referral. Note that there is no separate "updateStatus" on the ReferralDetails element, since it provides identifying details for the overall ClientReferral. When present, the ClientDetails element is used to update the client details associated with this ClientReferral. All items are required, however the NHS number may be empty if not known. Update status on each AssessmentDetails element may be as follows: "add" - New assessment; "update" - information concerning an assessment for which information has already been given in a previous return instance; "delete" - erroneous data to be removed from the cumulated dataset. The value of AssessmentDate is used to match an "update" or "delete" with previously returned AssessmentDetails. An AssessmentDetails element element with "delete" may be followed (immediately or later in the return) by an AssessmentDetails element with "add" that replaces the erroneous data just deleted. Update status on each TreatmentModalityDetails element may be as follows: "add" - New treatment modality details; "update" - information concerning a treatment modality for which information has already been given in a previous return instance; "delete" - erroneous data to be removed from the cumulated dataset. The combined values of TreatmentModalityKind and ModalityReferralDate are used to match an "update" or "delete" with previously returned TreatmentModalityDetails. A TreatmentModalityDetails element with "delete" may be followed (immediately or later in the return) by a TreatmentModalityDetails element with "add" that replaces the erroneous data just deleted. Update status on each TreatmentOutcomeProfileDetails element may be as follows: "add" - New TOP details; "update" - information concerning a TOP for which information has already been given in a previous return instance; "delete" - erroneous data to be removed from the cumulated dataset. The combined values of TOPnumber and TOPinterviewDate are used to match an "update" or "delete" with previously returned TreatmentOutcomeProfileDetails. A TreatmentOutcomeProfileDetails element with "delete" may be followed (immediately or later in the return) by a TreatmentOutcomeProfileDetails element with "add" that replaces the erroneous data just deleted. Update status on each DischargeDetails element may be as follows: "add" - New treatment modality details; "update" - information concerning a treatment modality for which information has already been given in a previous return instance; "delete" - erroneous data to be removed from the cumulated dataset. A DischargeDetails element with "delete" may be followed (immediately or later in the return) by a DischargeDetails element with "add" that replaces the erroneous data just deleted.