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Part II. Phased Implementation Plan for DMACData Transport Activities and Schedule(see Figure 5)1. Activity: Develop Comprehensive IOOS Data Model• Description: Accessed data will be moved into the data model for transport between serverand client.• Comment: There is no strict requirement for a single comprehensive model, but there shouldgenerally be only a single, correct representation for any given data class. If multiple representationsof the same data class do exist, a reliable procedure to translate between them must bedocumented• Milestone 1: Develop Comprehensive Data Model - Complete from the perspective of bothsyntactic and semantic elements – To provide the maximum flexibility in system design, the datamodel should be divided into a syntactic portion that is discipline neutral and a semantic portionthat contains the discipline specific characteristics of the data.- Task 1: Develop a syntactic data model 6 for the system.º Approach: Adopt the OPeNDAP data model as the initial, provisional fast-track solution 7 .º Special Considerations: The primary focus of this task should be the augmentation (ifneeded) of the OPeNDAP data model to accommodate data types within the OBIS andGIS data models.º Level of Effort: FTE 8 (TBD)º Duration: 6 months. The task outlined here is only for the initial development of the semanticdata model. A subsequent task addresses the evolution of the model. This is true ofTask 2 also.º Start: Immediately 9 .º Category: Committee, OPeNDAP, OBIS, or the Data Model Working Group.- Task 2: Develop a semantic data model for the system.º Approach: Consider existing semantic data models such as that being promoted by OGIS,the DEI data model and others that may already exist. It is imperative that the semanticdata model be kept as simple as possible to ensure the maximum compliance within theocean community.6The resulting data model may in fact consist of several data models. If so, they will collectively be referred to as the data model inthis work plan.7The OPeNDAP data model has been developed explicitly for this purpose, has already been vetted within the ocean community aspart of the NOPP funded NVODS effort and is now in operational use by NVODS (as well as other non-oceanographic communities).8The levels of effort identified in this work plan are supported FTEs (full time equivalent years). This support could be provided bysubcontract to one of the groups indicated or provide funding to the Data Model Working Group for this purpose. Addition communityparticipation is anticipated on many of these efforts through committee work. The level of effort for such committee work isnot included here.9Immediately means as soon as practical. These are absolutely essential components of the system, components on which much ofthe rest of the data management system rests.85