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 # Building from Source
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+
+# DynamoDB Schema
+
+[Amazon DynamoDB](https://aws.amazon.com/dynamodb) is a NoSQL database service designed for high-performance, scalable, and low-latency applications.
+
+In a DynamoDB table, the primary key is a fundamental component of the database schema, used to uniquely identify and organize items within a table. The primary key consists of two attributes: the partition key (PK) and the sort key (SK). The partition key is the primary attribute used to distribute data across multiple partitions for scalability.
+
+The table may also include Global Secondary Indexes named using the prefix (GSI) which can be employed to facilitate efficient querying of data based on different attributes.
+
+## Multi-Tenant
+
+When an entity is stored for a specific `SiteId` other than the `default` site. The format of the `PK` is prefixed with `SiteId/`.
+
+For example: When using a siteId of `finance`, the PK will store a document using `finance/docx#`.
+
+## Documents
+
+The following are the entities related to `Documents`.
+
+### Document
+
+The Document Entity consists of attributes that capture essential information about a document.
+
+#### Entity Key Schema
+
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "doc#" + documentId  |
+| SK | "document" | 
+| GSI1PK | ShortDate(yyyy-MM-ddd)  |
+| GSI1SK | FullDate("yyyy-MM-dd’T’HH:mm:ssZ") + "#" + documentId |
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Document Idenifier  |
+| inserteddate | Inserted Date | 
+| lastModifiedDate | Last Modified Date |
+| userId | Create by user |
+| path | Document path |
+| deepLinkPath | Document deep link path |
+| contentType | Mime Content Type |
+| checksum | Document content checksum |
+| tagSchemaId | Tag Schema for document |
+
+### Child Document
+
+A Child Document Entity includes attributes that capture details specific to the subsidiary document.
+
+#### Entity Key Schema
+
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "doc#" + documentId  |
+| SK | "document#" + childDocumentId | 
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Document Idenifier  |
+| inserteddate | Inserted Date | 
+| lastModifiedDate | Last Modified Date |
+| userId | Create by user |
+| path | Document path |
+| deepLinkPath | Document deep link path |
+| contentType | Mime Content Type |
+| checksum | Document content checksum |
+| tagSchemaId | Tag Schema for document |
+| belongsToDocumentId | Parent Id of document |
+
+### Document (Soft Delete)
+
+A "soft delete" Document is moved into a different PK namespace than all other documents.
+
+#### Entity Key Schema
+
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "softdelete#doc#"  |
+| SK | "softdelete#document" + documentId |
+| GSI1PK | ShortDate(yyyy-MM-ddd)  |
+| GSI1SK | FullDate("yyyy-MM-dd’T’HH:mm:ssZ") + "#" + documentId | 
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Document Idenifier  |
+| inserteddate | Inserted Date | 
+| lastModifiedDate | Last Modified Date |
+| userId | Create by user |
+| path | Document path |
+| deepLinkPath | Document deep link path |
+| contentType | Mime Content Type |
+| checksum | Document content checksum |
+| tagSchemaId | Tag Schema for document |
+
+### Document Ocr
+
+Contains all information about any optical character recognition (OCR) data for the document.
+
+#### Entity Key Schema
+							
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "doc#" + documentId  |
+| SK | "ocr#" |
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Document Idenifier  |
+| inserteddate | Inserted Date | 
+| userId | Create by user |
+| contentType | Mime Content Type |
+| ocrEngine | Ocr Engine Used (textract, tesseract) |
+| jobId | Ocr Job Id |
+
+### Document Actions
+
+Contains list of document actions.
+
+#### Entity Key Schema
+							
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "doc#" + documentId  |
+| SK | "action#" + idx + "#" + type |
+| GSI1PK | "action#" + type + "#" + queueId  |
+| GSI1SK | "action#" + documentId + "#" + yyyy-MM-dd’T’HH:mm:ssZ | 
+| GSI2PK | "actions#" + status  |
+| GSI2SK | "action#" + documentId | 
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Document Idenifier  |
+| type | Type of Action | 
+| status | Status of Action |
+| parameters | Parameters for Action |
+| metadata | Metadata for Action |
+| userId | Create by user |
+| inserteddate | Inserted Date | 
+| startDate | Start Date of action | 
+| completedDate | Completed Date | 
+| message | Action message |
+| queueId | Queue Id |
+| workflowId | Workflow Id |
+| workflowStepId | Workflow Step Id |
+| workflowLastStep | Workflow Last Step |
+
+### Document Tag
+
+Document Tag(s) entity.
+
+#### Entity Key Schema
+							
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "doc#" + documentId  |
+| SK | "tags#" + tagKey |
+| GSI1PK | "tag#" + tagKey + “#” + tagValue |
+| GSI1SK | "yyyy-MM-dd’T’HH:mm:ssZ" + “#” + documentId |
+| GSI2PK | "tag#" + tagKey  |
+| GSI2SK | tagValue + "#" + yyyy-MM-dd’T’HH:mm:ssZ + "#" + documentId | 
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Document Idenifier  |
+| type | Type of Tag | 
+| tagValue | Tag Value |
+| userId | Create by user |
+| inserteddate | Inserted Date |
+
+### Document Tag (Multi-Value)
+
+Document Tag(s) entity with multiple values.
+
+#### Entity Key Schema
+							
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "doc#" + documentId  |
+| SK | "tags#" + tagKey + "#idx" + index |
+| GSI1PK | "tag#" + tagKey + “#” + tagValue |
+| GSI1SK | "yyyy-MM-dd’T’HH:mm:ssZ" + “#” + documentId |
+| GSI2PK | "tag#" + tagKey  |
+| GSI2SK | tagValue + "#" + yyyy-MM-dd’T’HH:mm:ssZ + "#" + documentId | 
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Document Idenifier  |
+| type | Type of Tag | 
+| tagValue | Tag Value |
+| tagValues | Tag Values |
+| userId | Create by user |
+| inserteddate | Inserted Date |
+
+### Document Activity
+
+Contains list of document activties.
+
+#### Entity Key Schema
+							
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "doc#" + documentId  |
+| SK | "activity#" + yyyy-MM-dd’T’HH:mm:ssZ |
+| GSI1PK | "activity#user#" + username  |
+| GSI1SK | "activity#" + yyyy-MM-dd’T’HH:mm:ssZ + "#" + documentId | 
+| GSI2PK | "activity#"  |
+| GSI2SK | "activity#" + yyyy-MM-dd’T’HH:mm:ssZ + "#" + documentId | 
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Document Idenifier  |
+| type | Type of User Activity (view, add, change, delete) | 
+| userId | Create by user |
+| inserteddate | Inserted Date | 
+
+## Document TagSchema
+
+The Document TagSchema entity and attributes.
+
+#### Entity Key Schema
+
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "tagSchemas#" + documentId  |
+| SK | "schema#" | 
+| GSI1PK | "tagSchemas#"  |
+| GSI1SK | "ts#" + name + "#" + documentId |
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Document Idenifier  |
+| inserteddate | Inserted Date | 
+| userId | Create by user |
+| name | Name of TagSchema |
+| schema | TagSchema JSON document |
+
+## Document Shares
+
+The following are the entities related to sharing of Documents.
+
+### Shares
+
+A list of shares for a particular user role.
+
+#### Entity Key Schema
+
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "shares#" + (group/user) + "#" + name  |
+| SK | "share#" + siteId + "#" + documentId | 
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Document Idenifier  |
+| type | Type of Share (File or Directory)
+| inserteddate | Inserted Date | 
+| userId | Create by user |
+| path | Folder path |
+| name | Name of share |
+| siteId | SiteId share is part of |
+| permissionType | Type of permission |
+| permissions | List of permissions |
+
+### Document Share
+
+A list of shares for a particular user role.
+
+#### Entity Key Schema
+
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "shares#" + documentId |
+| SK | "share" | 
+| GSI1PK | "share#" + name;  |
+| GSI1SK | "share#" + path + "#" + documentId |
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Share Idenifier  |
+| sharedDocumentId | Shared Document Id |
+| name | Name of share |
+| type | Type of Share (File or Directory)
+| inserteddate | Inserted Date | 
+| userId | Create by user |
+| path | Folder path |
+| name | Name of share |
+| siteId | SiteId share is part of |
+| permissionType | Type of permission |
+| permissions | List of permissions |
+
+### Document Folder
+
+Document folder / file listing index.
+
+#### Entity Key Schema
+
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "global#folders#" + parentDocumentId |
+| SK | "ff#" + path OR "fi#" + path | 
+| GSI1PK (folder only) | "folder#" + documentId |
+| GSI1SK (folder only) | "folder" |
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Share Idenifier  |
+| path | Folder path |
+| type | Type of Share (File or Directory)
+| parentDocumentId | Parent Document Id |
+| inserteddate | Inserted Date | 
+| lastModifiedDate | Last Modified Date | 
+| userId | Create by user |
+
+### Queue
+
+Queue entity object.
+
+#### Entity Key Schema
+
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "queues#" + this.documentId |
+| SK | "queue" | 
+| GSI1PK | "queues#" |
+| GSI1SK | "queue#" + name + "#" + documentId |
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Share Idenifier  |
+| name | Name of Queue |
+
+## Workflows
+
+The following are the entities related to `Workflows`.
+
+### Workflow
+
+The workflow entity consists of attributes that capture essential information about a workflow.
+
+#### Entity Key Schema
+
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "workflows#" + documentId  |
+| SK | "workflow" | 
+| GSI1PK | "workflows#"  |
+| GSI1SK | "workflow#" + name + "#" + documentId |
+| GSI2PK | "workflows#"  |
+| GSI2SK | "workflow#" + status + "#" + name + "#" + documentId |
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Document Idenifier  |
+| name | Name of Workflow | 
+| inUse | Whether Workflow is in use |
+| status | Workflow status |
+| description | Workflow description |
+| userId | Create by user |
+| json | Workflow JSON blob |
+
+### Document Workflow
+
+The document workflow entity consists of attributes that capture essential information about a document in a workflow.
+
+#### Entity Key Schema
+
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "wfdoc#" + documentId  |
+| SK | "wf#" + workflowId | 
+| GSI1PK | "wfdoc#" + documentId  |
+| GSI1SK | "wf#" + workflowName + "#" + workflowId |
+| GSI2PK | "wf#" + workflowId  |
+| GSI2SK | "wfdoc#" + documentId |
+
+#### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| documentId | Document Idenifier  |
+| workflowId | Workflow identifier | 
+| workflowName | Workflow name |
+| status | Workflow status |
+| actionPk | Action PK |
+| actionSk | Action SK |
+| currentStepId | Current Workflow step Id |
+
+## API Keys
+
+Api Key(s) allow access to API.
+
+### Entity Key Schema
+
+| Attributes   | Format |
+| -------- | ------- | 
+| PK | "apikeys#"  |
+| SK | "apikey#" + apiKey | 
+| GSI1PK | siteId + "/apikeys#"  |
+| GSI1SK | "apikey#" + name + apiKey |
+| GSI2PK | siteId/“apikeys#”  |
+| GSI2SK | “apikey#” + apiKey (mask) |
+
+### Entity Attributes
+
+| Attributes   | Description |
+| -------- | ------- | 
+| apiKey | API Key  |
+| name | API Key Name | 
+| userId | Create by user |
+| siteId | Site Identifier
+| permissions | List of API Key permissions (read/write/delete) |
+| inserteddate | Inserted Date | 
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