message: ConcurrencyControl docs - fix broken links
diff: @@ -18,17 +18,17 @@ This article assumes that you already know that:
  * An iModel is a multi-user database
  * An app works with a [briefcase](../learning/Glossary.md#Briefcase) using the [IModelDb]($imodeljs-backend.IModelDb) class.
  -* A briefcase has a unique identity that is issued and tracked by [iModelHub](../../overview/IModelHub.md).
  +* A briefcase has a unique identity that is issued and tracked by [iModelHub](../../overview/overview/IModelHub.md).
  * Changes are captured and distributed in the form of [ChangeSets](../learning/Glossary.md#ChangeSets).
  -* ChangeSets are ordered in a sequence that is called the [timeline](../../overview/IModelHub.md#the-timeline-of-changes) of the iModel.
  +* ChangeSets are ordered in a sequence that is called the [timeline](../../overview/overview/IModelHub.md#the-timeline-of-changes) of the iModel.
  * ChangeSets are stored in iModelHub
  -* A [Code](../learning/Glossary.md#Code) is an identifier that assigned to an element and is managed by a central Code Service.
  +* A [Code](../learning/Glossary.md#Code) is an identifier that is assigned to an element and is managed by a central Code Service.
  ## Concurrency Glossary
  |Term | Definition
  |------------|------------|
  -|**Base**|ChangeSet B is *based* on ChangeSet A if B comes after A in the [timeline](../../overview/IModelHub.md#the-timeline-of-changes).
  +|**Base**|ChangeSet B is *based* on ChangeSet A if B comes after A in the [timeline](../../overview/overview/IModelHub.md#the-timeline-of-changes).
  |**Change-merging**|Same as merge.
  |**Code Reservation**|The right to use a Code
  |**Concurrency Control**|How to coordinate simultaneous transactions while preserving data integrity.
  @@ -42,8 +42,8 @@ This article assumes that you already know that:
  |**Push**|Upload a ChangeSet to iModelHub
  |**Pull**|Download a ChangeSet from iModelHub
  |**Rebase**|Adjust a ChangeSet so that its pre-change state matches the post-change state of some other ChangeSet.
  -|**Revision**|The state of an iModel as of a specific point in its [timeline](../../overview/IModelHub.md#the-timeline-of-changes), that is, the result of the ChangeSets up to that point.
  -|**Tip**|The most recent revision of an iModel. Also, the most recent ChangeSet in the [timeline](../../overview/IModelHub.md#the-timeline-of-changes).
  +|**Revision**|The state of an iModel as of a specific point in its [timeline](../../overview/overview/IModelHub.md#the-timeline-of-changes), that is, the result of the ChangeSets up to that point.
  +|**Tip**|The most recent revision of an iModel. Also, the most recent ChangeSet in the [timeline](../../overview/overview/IModelHub.md#the-timeline-of-changes).
  |**Transaction**|A set of changes that are committed or abandoned atomically, making up a unit of work. Multiple transactions to a briefcase are combined into a [ChangeSet](../learning/Glossary.md#ChangeSets).
  ## Code Reservation
  