vesoft-inc · randomJoe211 · Mar 13, 2023 · Feb 7, 2023 · Feb 7, 2023 · Feb 7, 2023
diff --git a/docs-2.0/1.introduction/3.vid.md b/docs-2.0/1.introduction/3.vid.md
@@ -1,6 +1,6 @@
 # VID
 
-In NebulaGraph, a vertex is uniquely identified by its ID, which is called a VID or a Vertex ID.
+In a graph space, a vertex is uniquely identified by its ID, which is called a VID or a Vertex ID.
 
 ## Features
 

diff --git a/docs-2.0/2.quick-start/1.quick-start-workflow.md b/docs-2.0/2.quick-start/1.quick-start-workflow.md
@@ -1,10 +1,39 @@
-# Quick start workflow
+# Getting started with NebulaGraph
 
-The quick start introduces the simplest workflow to use NebulaGraph, including deploying NebulaGraph, connecting to NebulaGraph, and doing basic CRUD.
+This topic describes how to use NebulaGraph with Docker Desktop and on-premises deployment workflow to quickly get started with NebulaGraph.
 
-## Steps
+## Using NebulaGraph with Docker Desktop
 
-Users can quickly deploy and use NebulaGraph in the following steps.
+NebulaGraph is available as a [Docker Extension](https://hub.docker.com/extensions/weygu/nebulagraph-dd-ext) that you can easily install and run on your Docker Desktop. You can quickly deploy NebulaGraph using Docker Desktop with just one click.
+
+1. Install Docker Desktop
+
+  - [Install Docker Desktop on Mac](https://docs.docker.com/docker-for-mac/install/)
+  - [Install Docker Desktop on Windows](https://docs.docker.com/docker-for-windows/install/)
+
+  !!! caution
+       To install Docker Desktop, you need to install [WSL 2](https://docs.docker.com/desktop/install/windows-install/#system-requirements) first. 
+
+2. In the left sidebar of Docker Desktop, click **Extensions** or **Add Extensions**.
+3. On the Extensions Marketplace, search for NebulaGraph and click **Install**.
+
+  ![docker](https://docs-cdn.nebula-graph.com.cn/figures/docker.png)
+
+  Click **Update** to update NebulaGraph to the latest version when a new version is available.
+
+  ![docker-update](https://docs-cdn.nebula-graph.com.cn/figures/docker-update.png)
+
+4. Click **Open** to navigate to the NebulaGraph extension page.
+
+5. At the top of the page, click **Studio in Browser** to use NebulaGraph.
+
+For more information about how to use NebulaGraph with Docker Desktop, see the following video:
+
+<iframe width="560" height="315" src="https://www.youtube.com/embed/8zKer-4RXEg" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>
+
+## Deploying NebulaGraph on-premises workflow
+
+The following workflow describes how to use NebulaGraph on-premises, including deploying NebulaGraph, connecting to NebulaGraph, and running basic CRUD.
 
 1. [Deploy NebulaGraph](2.install-nebula-graph.md)
 

diff --git a/docs-2.0/20.appendix/history.md b/docs-2.0/20.appendix/history.md
@@ -36,3 +36,9 @@
 9. 2022.2: NebulaGraph v3.0.0 was released.
 
 10. 2022.4: NebulaGraph v3.1.0 was released.
+
+11. 2022.7: NebulaGraph v3.2.0 was released.
+
+12. 2022.10: NebulaGraph v3.3.0 was released.
+
+13. 2023.2: NebulaGraph v3.4.0 was released.
diff --git a/docs-2.0/20.appendix/release-notes/dashboard-comm-release-note.md b/docs-2.0/20.appendix/release-notes/dashboard-comm-release-note.md
@@ -1,67 +1,12 @@
 # NebulaGraph Dashboard Community Edition {{ nebula.release }} release notes
 
-## Feature
+## Community Edition 3.4.0
 
-- Support [killing sessions](../../3.ngql-guide/17.query-tuning-statements/2.kill-session.md). [#5146](https://github.com/vesoft-inc/nebula/pull/5146)
-- Support [Memory Tracker](../../5.configurations-and-logs/1.configurations/4.storage-config.md) to optimize memory management. [#5082](https://github.com/vesoft-inc/nebula/pull/5082)
+- Feature
+  - Support the built-in [dashboard.service](../../nebula-dashboard/2.deploy-dashboard.md) script to manage the Dashboard services with one-click and view the Dashboard version.
+  - Support viewing the configuration of Meta services.
 
-## Enhancement
-
-- Optimize job management. [#5212](https://github.com/vesoft-inc/nebula/pull/5212) [#5093](https://github.com/vesoft-inc/nebula/pull/5093) [#5099](https://github.com/vesoft-inc/nebula/pull/5099) [#4872](https://github.com/vesoft-inc/nebula/pull/4872)
-
-- Modify the default value of the Graph service parameter `session_reclaim_interval_secs` to 60 seconds. [#5246](https://github.com/vesoft-inc/nebula/pull/5246)
-
-- Adjust the default level of `stderrthreshold` in the configuration file. [#5188](https://github.com/vesoft-inc/nebula/pull/5188)
-
-- Optimize the full-text index. [#5077](https://github.com/vesoft-inc/nebula/pull/5077) [#4900](https://github.com/vesoft-inc/nebula/pull/4900) [#4925](https://github.com/vesoft-inc/nebula/pull/4925)
-
-- Limit the maximum depth of the plan tree in the optimizer to avoid stack overflows. [#5050](https://github.com/vesoft-inc/nebula/pull/5050)
-
-- Optimize the treatment scheme when the pattern expressions are used as predicates. [#4916](https://github.com/vesoft-inc/nebula/pull/4916)
-
-## Bugfix
-
-- Fix the bug about query plan generation and optimization. [#4863](https://github.com/vesoft-inc/nebula/pull/4863) [#4813](https://github.com/vesoft-inc/nebula/pull/4813)
-
-- Fix the bugs related to indexes:
-
-  - Full-text indexes [#5214](https://github.com/vesoft-inc/nebula/pull/5214) [#5260](https://github.com/vesoft-inc/nebula/pull/5260)
-  - String indexes [5126](https://github.com/vesoft-inc/nebula/pull/5126)
-
-- Fix the bugs related to query statements:
-
-  - Variables [#5192](https://github.com/vesoft-inc/nebula/pull/5192)
-  - Filter conditions and expressions [#4952](https://github.com/vesoft-inc/nebula/pull/4952) [#4893](https://github.com/vesoft-inc/nebula/pull/4893) [#4863](https://github.com/vesoft-inc/nebula/pull/4863)
-  - Properties of vertices or edges [#5230](https://github.com/vesoft-inc/nebula/pull/5230) [#4846](https://github.com/vesoft-inc/nebula/pull/4846) [#4841](https://github.com/vesoft-inc/nebula/pull/4841) [#5238](https://github.com/vesoft-inc/nebula/pull/5238)
-  - Functions and aggregations [#5135](https://github.com/vesoft-inc/nebula/pull/5135) [#5121](https://github.com/vesoft-inc/nebula/pull/5121) [#4884](https://github.com/vesoft-inc/nebula/pull/4884)
-  - Using illegal data types [#5242](https://github.com/vesoft-inc/nebula/pull/5242)
-  - Clauses and operators [#5241](https://github.com/vesoft-inc/nebula/pull/5241) [#4965](https://github.com/vesoft-inc/nebula/pull/4965)
-
-- Fix the bugs related to DDL and DML statements:
-
-  - ALTER TAG [#5105](https://github.com/vesoft-inc/nebula/pull/5105) [#5136](https://github.com/vesoft-inc/nebula/pull/5136)
-  - UPDATE [#4933](https://github.com/vesoft-inc/nebula/pull/4933)
-
-- Fix the bugs related to other functions:
-
-  - TTL [#4961](https://github.com/vesoft-inc/nebula/pull/4961)
-  - Authentication [#4885](https://github.com/vesoft-inc/nebula/pull/4885)
-  - Services [#4896](https://github.com/vesoft-inc/nebula/pull/4896)
-
-## Change
-
-- The added property name can not be the same as an existing or deleted property name, otherwise, the operation of adding a property fails. [#5130](https://github.com/vesoft-inc/nebula/pull/5130)
-- Limit the type conversion when modifying the schema. [#5098](https://github.com/vesoft-inc/nebula/pull/5098)
-- The default value must be specified when creating a property of type `NOT NULL`. [#5105](https://github.com/vesoft-inc/nebula/pull/5105)
-- Add the multithreaded query parameter `query_concurrently` to  the configuration file with a default value of `true`. [#5119](https://github.com/vesoft-inc/nebula/pull/5119)
-- Remove the parameter `kv_separation` of the KV separation storage function from the configuration file, which is turned off by default. [#5119](https://github.com/vesoft-inc/nebula/pull/5119)
-- Modify the default value of `local_config` in the configuration file to `true`. [#5119](https://github.com/vesoft-inc/nebula/pull/5119)
-- Consistent use of `v.tag.property` to get property values, because it is necessary to specify the Tag. Using `v.property` to access the property of a Tag on `v` was incorrectly allowed in the previous version. [#5230](https://github.com/vesoft-inc/nebula/pull/5230)
-- Remove the column `HTTP port` from the command `SHOW HOSTS`. [#5056](https://github.com/vesoft-inc/nebula/pull/5056)
-- Disable the queries of the form `OPTIONAL MATCH <pattern> WHERE <condition>`. [#5273](https://github.com/vesoft-inc/nebula/pull/5273)
-- Disable TOSS. [#5119](https://github.com/vesoft-inc/nebula/pull/5119)
-- Rename Listener's pid filename and log directory name. [#5119](https://github.com/vesoft-inc/nebula/pull/5119)
-
-## Legacy versions
-
-[Release notes of legacy versions](https://nebula-graph.io/posts/)
+- Enhancement
+  - Adjust the directory structure and simplify the [deployment steps](../../nebula-dashboard/2.deploy-dashboard.md).
+  - Display the names of the monitoring metrics on the overview page of `machine`.
+  - Optimize the calculation of monitoring metrics such as `num_queries`, and adjust the display to time series aggregation.
diff --git a/docs-2.0/20.appendix/release-notes/dashboard-ent-release-note.md b/docs-2.0/20.appendix/release-notes/dashboard-ent-release-note.md
@@ -1,5 +1,13 @@
 # NebulaGraph Dashboard Enterprise Edition release notes
 
+## Enterprise Edition 3.4.1
+
+- Bugfix
+
+  - Fix the bug that the RPM package cannot execute `nebula-agent` due to permission issues.
+  - Fix the bug that the cluster import information can not be viewed due to the `goconfig` folder permission.
+  - Fix the page error when the license expiration time is less than `30` days and `gracePeriod` is greater than `0`.
+
 ## Enterprise Edition 3.4.0
 
 - Feature

diff --git a/docs-2.0/20.appendix/release-notes/nebula-comm-release-note.md b/docs-2.0/20.appendix/release-notes/nebula-comm-release-note.md
@@ -1,75 +1,15 @@
 # NebulaGraph {{ nebula.release }} release notes
 
-## Enhancement
-
-- Optimized the performance of k-hop. [#4560](https://github.com/vesoft-inc/nebula/pull/4560) [#4736](https://github.com/vesoft-inc/nebula/pull/4736)  [#4566](https://github.com/vesoft-inc/nebula/pull/4566) [#4582](https://github.com/vesoft-inc/nebula/pull/4582) [#4558](https://github.com/vesoft-inc/nebula/pull/4558) [#4556](https://github.com/vesoft-inc/nebula/pull/4556) [#4555](https://github.com/vesoft-inc/nebula/pull/4555) [#4516](https://github.com/vesoft-inc/nebula/pull/4516) [#4531](https://github.com/vesoft-inc/nebula/pull/4531) [#4522](https://github.com/vesoft-inc/nebula/pull/4522) [#4754](https://github.com/vesoft-inc/nebula/pull/4754) [#4762](https://github.com/vesoft-inc/nebula/pull/4762)
-
-- Optimized `GO` statement join performance. [#4599](https://github.com/vesoft-inc/nebula/pull/4599) [#4750](https://github.com/vesoft-inc/nebula/pull/4750)
-
-- Supported using `GET SUBGRAPH` to filter vertices. [#4357](https://github.com/vesoft-inc/nebula/pull/4357)
-
-- Supported using `GetNeighbors` to filter vertices. [#4671](https://github.com/vesoft-inc/nebula/pull/4671)
-
-- Optimized the loop handling of `FIND SHORTEST PATH`. [#4672](https://github.com/vesoft-inc/nebula/pull/4672)
-
-- Supported the conversion between timestamp and date time. [#4626](https://github.com/vesoft-inc/nebula/pull/4526)
-
-- Supported the reference of local variable in pattern expressions. [#4498](https://github.com/vesoft-inc/nebula/pull/4498)
-
-- Optimized the job manager. [#4446](https://github.com/vesoft-inc/nebula/pull/4446) [#4442](https://github.com/vesoft-inc/nebula/pull/4442) [#4444](https://github.com/vesoft-inc/nebula/pull/4444) [#4460](https://github.com/vesoft-inc/nebula/pull/4460) [#4500](https://github.com/vesoft-inc/nebula/pull/4500) [#4633](https://github.com/vesoft-inc/nebula/pull/4633) [#4654](https://github.com/vesoft-inc/nebula/pull/4654) [#4663](https://github.com/vesoft-inc/nebula/pull/4663) [#4722](https://github.com/vesoft-inc/nebula/pull/4722) [#4742](https://github.com/vesoft-inc/nebula/pull/4742)
-
-- Added flags of experimental features, `enable_data_balance` for `BALANCE DATA`. [#4728](https://github.com/vesoft-inc/nebula/pull/4728)
-
-- Stats log print to console when the process is started. [#4550](https://github.com/vesoft-inc/nebula/pull/4550)
-
-- Supported the `JSON_EXTRACT` function. [#4743](https://github.com/vesoft-inc/nebula/pull/4743)
-
 ## Bugfix
 
-- Fixed the crash of variable types collected. [#4724](https://github.com/vesoft-inc/nebula/pull/4724)
-
-- Fixed the crash in the optimization phase of multiple `MATCH`. [#4780](https://github.com/vesoft-inc/nebula/pull/4780)
-
-- Fixed the bug of aggregate expression type deduce. [#4706](https://github.com/vesoft-inc/nebula/pull/4706)
-
-- Fixed the incorrect result of the `OPTIONAL MATCH` statement. [#4670](https://github.com/vesoft-inc/nebula/pull/4670)
-
-- Fixed the bug of parameter expression in the `LOOKUP` statement. [#4664](https://github.com/vesoft-inc/nebula/pull/4664)
+- Fix the crash caused by encoding parameter expressions to the storage layer for execution. [#5336](https://github.com/vesoft-inc/nebula/pull/5336)
 
-- Fixed the bug that `YIELD DISTINCT` returned a distinct result set in the `LOOKUP` statement. [#4651](https://github.com/vesoft-inc/nebula/pull/4651)
+- Fix some crashes for the list function. [#5383](https://github.com/vesoft-inc/nebula/pull/5383)
 
-- Fixed the bug that `ColumnExpression` encode and decode are not matched. [#4413](https://github.com/vesoft-inc/nebula/pull/4413)
-
-- Fixed the bug that `id($$)` filter was incorrect in the `GO` statement.  [#4768](https://github.com/vesoft-inc/nebula/pull/4768)
-
-- Fixed the bug that full scan of `MATCH` statement when there is a relational `In` predicate. [#4748](https://github.com/vesoft-inc/nebula/pull/4748)
-
-- Fixed the optimizer error of `MATCH` statement.[#4771](https://github.com/vesoft-inc/nebula/pull/4771)
-
-- Fixed wrong output when using `pattern` expression as the filter in `MATCH` statement.  [#4778](https://github.com/vesoft-inc/nebula/pull/4778)
-
-- Fixed the bug that tag, edge, tag index and edge index display incorrectly. [#4616](https://github.com/vesoft-inc/nebula/pull/4616)
-
-- Fixed the bug of date time format. [#4524](https://github.com/vesoft-inc/nebula/pull/4524)
-
-- Fixed the bug that the return value of the date time vertex was changed. [#4448](https://github.com/vesoft-inc/nebula/pull/4448)
-
-- Fixed the bug that the startup service failed when the log directory not existed and `enable_breakpad` was enabled. [#4623](https://github.com/vesoft-inc/nebula/pull/4623)
-
-- Fixed the bug that after the metad stopped, the status remained online. [#4610](https://github.com/vesoft-inc/nebula/pull/4610)
-
-- Fixed the corruption of the log file. [#4409](https://github.com/vesoft-inc/nebula/pull/4409)
-
-- Fixed the bug that `ENABLE_CCACHE` option didn't work. [#4648](https://github.com/vesoft-inc/nebula/pull/4648)
-
-- Abandoned uppercase letters in full-text index names.  [#4628](https://github.com/vesoft-inc/nebula/pull/4628)
+## Legacy versions
 
-- Disable `COUNT(DISTINCT *)` . [#4553](https://github.com/vesoft-inc/nebula/pull/4553)
+[Release notes of legacy versions](https://nebula-graph.io/posts/)
 
-### Change
 
-- Vertices without tags are not supported by default. If you want to use the vertex without tags, add `--graph_use_vertex_key=true` to the configuration files (`nebula-graphd.conf`) of all Graph services in the cluster, add `--use_vertex_key=true` to the configuration files (`nebula-storaged.conf`) of all Storage services in the cluster. [#4629](https://github.com/vesoft-inc/nebula/pull/4629) 
 
-## Legacy versions
 
-[Release notes of legacy versions](https://nebula-graph.io/posts/)
diff --git a/docs-2.0/20.appendix/release-notes/nebula-ent-release-note.md b/docs-2.0/20.appendix/release-notes/nebula-ent-release-note.md
@@ -1,90 +1,11 @@
 # NebulaGraph {{ nebula.release }} release notes
 
-## Feature
-
-- Support [incremental backup](../../backup-and-restore/nebula-br-ent/1.br-ent-overview.md).
-- Support [fine-grained permission management]((../../7.data-security/1.authentication/3.role-list.md)) at the Tag/Edge type level.
-- Support [killing sessions](../../3.ngql-guide/17.query-tuning-statements/2.kill-session.md).
-- Support [Memory Tracker](../../5.configurations-and-logs/1.configurations/4.storage-config.md) to optimize memory management.
-- Support [black-box monitoring](../../6.monitor-and-metrics/3.bbox/3.1.bbox.md).
-- Support function [json_extract](../../3.ngql-guide/6.functions-and-expressions/2.string.md).
-- Support function [extract](../../3.ngql-guide/6.functions-and-expressions/2.string.md).
-
-## Enhancement
-
-- Support using `GET SUBGRAPH` to filter vertices.
-- Support using `GetNeighbors` to filter vertices.
-- Support the conversion between timestamp and date time.
-- Support the reference of local variable in pattern expressions.
-- Optimize job management.
-- Optimize the full-text index.
-- Optimize the treatment scheme when the pattern expressions are used as predicates.
-- Optimize the join performance of the GO statement.
-- Optimize the performance of k-hop.
-- Optimize the performance of the shortest path query.
-- Optimize the push-down of the filtering of the vertex property.
-- Optimize the push-down of the edge filtering.
-- Optimize the loop conditions of the subgraph query.
-- Optimize the rules of the property cropping.
-- Remove the invalid `Project` operators.
-- Remove the invalid `AppendVertices` operators.
-- Reduce the amount of data replication for connection operations.
-- Reduce the amount of data replication for `Traverse` and `AppendVertices` operators.
-- Modify the default value of the Graph service parameter `session_reclaim_interval_secs` to 60 seconds.
-- Adjust the default level of `stderrthreshold` in the configuration file.
-- Get the property values by subscript to reduce the time of property query.
-- Limit the maximum depth of the plan tree in the optimizer to avoid stack overflows.
-
 ## Bugfix
 
-- Fix the bug about query plan generation and optimization.
-
-- Fix the bugs related to indexes:
-
-  - Full-text indexes
-  - String indexes
-
-- Fix the bugs related to query statements:
-
-  - Variables
-  - Filter conditions and expressions
-  - Properties of vertices or edges
-  - parameters
-  - Functions and aggregations
-  - Using illegal data types
-  - Time zone, date, time, etc
-  - Clauses and operators
-
-- Fix the bugs related to DDL and DML statements:
-
-  - ALTER TAG
-  - UPDATE
-
-- Fix the bugs related to other functions:
-
-  - TTL
-  - Synchronization
-  - Authentication
-  - Services
-  - Logs
-  - Monitoring and statistics
-
-## Change
+- Fix the crash caused by encoding parameter expressions to the storage layer for execution.
 
-- If you want to upgrade NebulaGraph from version 3.1 to 3.4, please follow the instructions in the [upgrade document](../../4.deployment-and-installation/3.upgrade-nebula-graph/upgrade-nebula-ent-from-3.x-3.4.md).
-- The added property name can not be the same as an existing or deleted property name, otherwise, the operation of adding a property fails.
-- Limit the type conversion when modifying the schema.
-- The default value must be specified when creating a property of type `NOT NULL`.
-- Add the multithreaded query parameter `query_concurrently` to  the configuration file with a default value of `true`.
-- Remove the parameter `kv_separation` of the KV separation storage function from the configuration file, which is turned off by default.
-- Modify the default value of `local_config` in the configuration file to `true`.
-- Consistent use of `v.tag.property` to get property values, because it is necessary to specify the Tag. Using `v.property` to access the property of a Tag on `v` was incorrectly allowed in the previous version.
-- Remove the column `HTTP port` from the command `SHOW HOSTS`.
-- Disable the queries of the form `OPTIONAL MATCH <pattern> WHERE <condition>`.
-- Disable the functions of the form `COUNT(DISTINCT *)`.
-- Disable TOSS.
-- Rename Listener's pid filename and log directory name.
+- Fix some crashes for the list function.
 
 ## Legacy versions
 
-[Release notes of legacy versions](https://nebula-graph.io/posts/)
+[Release notes of legacy versions](https://www.nebula-graph.io/tags/release-notes)
diff --git a/docs-2.0/3.ngql-guide/1.nGQL-overview/keywords-and-reserved-words.md b/docs-2.0/3.ngql-guide/1.nGQL-overview/keywords-and-reserved-words.md
@@ -4,7 +4,7 @@ Keywords have significance in nGQL. It can be classified into reserved keywords
 
 If you must use keywords in schema:
 
-- Non-reserved keywords are permitted as identifiers without quoting. 
+- Non-reserved keywords can be used as identifiers without quotes if they are all in lowercase. However, if a non-reserved keyword contains any uppercase letters when used as an identifier, it must be enclosed in backticks (\`), for example, \`Comment\`.
 
 - To use special characters or reserved keywords as identifiers, quote them with backticks such as `AND`.