Product model using Core Product Model (CPM) and its extension Open Assembly Model (OAM) has been implemented with cloud compatible open source technologies. Implementation focuses on data structure for capturing assembly hierarchy, part details, part features and feature associations. Super Constraint Tolerance Feature (SCTF) model has been used to extract information from STEP file. A case study on Cylinder cap assembly has been taken to showcase the data structure and classes. Entity Attribute Value (EAV) model has been used to manage and store the product metadata and product data. Parts and assemblies are defined as entities, product metadata as attributes and product data as values has been stored in separate tables. Methods to populate product model at different stages of design has also been discussed.