Add versioned docs fro Zed v1.15.0

versioned_docs/version-v1.15.0/README.md

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+---
+sidebar_position: 1
+sidebar_label: Introduction
+---
+
+# The Zed Project
+
+Zed offers a new approach to data that makes it easier to manipulate and manage
+your data.
+
+With Zed's new [super-structured data model](formats/README.md#2-zed-a-super-structured-pattern),
+messy JSON data can easily be given the fully-typed precision of relational tables
+without giving up JSON's uncanny ability to represent eclectic data.
+
+## Getting Started
+
+Trying out Zed is easy: just [install](install.md) the command-line tool
+[`zq`](commands/zq.md) and run through the [zq tutorial](tutorials/zq.md).
+
+`zq` is a lot like [`jq`](https://stedolan.github.io/jq/)
+but is built from the ground up as a search and analytics engine based
+on the [Zed data model](formats/zed.md).  Since Zed data is a
+proper superset of JSON, `zq` also works natively with JSON.
+
+While `zq` and the Zed data formats are production quality, the Zed project's
+[Zed data lake](commands/zed.md) is a bit [earlier in development](commands/zed.md#status).
+
+For a non-technical user, Zed is as easy to use as web search
+while for a technical user, Zed exposes its technical underpinnings
+in a gradual slope, providing as much detail as desired,
+packaged up in the easy-to-understand
+[ZSON data format](formats/zson.md) and
+[Zed language](language/README.md).
+
+## Terminology
+
+"Zed" is an umbrella term that describes
+a number of different elements of the system:
+* The [Zed data model](formats/zed.md) is the abstract definition of the data types and semantics
+that underlie the Zed formats.
+* The [Zed formats](formats/README.md) are a family of
+[sequential (ZNG)](formats/zng.md), [columnar (VNG)](formats/vng.md),
+and [human-readable (ZSON)](formats/zson.md) formats that all adhere to the
+same abstract Zed data model.
+* A [Zed lake](commands/zed.md) is a collection of Zed data stored
+across one or more [data pools](commands/zed.md#data-pools) with ACID commit semantics and
+accessed via a [Git](https://git-scm.com/)-like API.
+* The [Zed language](language/README.md) is the system's dataflow language for performing
+queries, searches, analytics, transformations, or any of the above combined together.
+* A  [Zed query](language/overview.md) is a Zed script that performs
+search and/or analytics.
+* A [Zed shaper](language/shaping.md) is a Zed script that performs
+data transformation to _shape_
+the input data into the desired set of organizing Zed data types called "shapes",
+which are traditionally called _schemas_ in relational systems but are
+much more flexible in the Zed system.
+
+## Digging Deeper
+
+The [Zed language documentation](language/README.md)
+is the best way to learn about `zq` in depth.
+All of its examples use `zq` commands run on the command line.
+Run `zq -h` for a list of command options and online help.
+
+The [Zed lake documentation](commands/zed.md)
+is the best way to learn about `zed`.
+All of its examples use `zed` commands run on the command line.
+Run `zed -h` or `-h` with any subcommand for a list of command options
+and online help.  The same language query that works for `zq` operating
+on local files or streams also works for `zed query` operating on a lake.
+
+## Design Philosophy
+
+The design philosophy for Zed is based on composable building blocks
+built from self-describing data structures.  Everything in a Zed lake
+is built from Zed data and each system component can be run and tested in isolation.
+
+Since Zed data is self-describing, this approach makes stream composition
+very easy.  Data from a Zed query can trivially be piped to a local
+instance of `zq` by feeding the resulting Zed stream to stdin of `zq`, for example,
+```
+zed query "from pool | ...remote query..." | zq "...local query..." -
+```
+There is no need to configure the Zed entities with schema information
+like [protobuf configs](https://developers.google.com/protocol-buffers/docs/proto3)
+or connections to
+[schema registries](https://docs.confluent.io/platform/current/schema-registry/index.html).
+
+A Zed lake is completely self-contained, requiring no auxiliary databases
+(like the [Hive metastore](https://cwiki.apache.org/confluence/display/hive/design))
+or other third-party services to interpret the lake data.
+Once copied, a new service can be instantiated by pointing a `zed serve`
+at the copy of the lake.
+
+Functionality like [data compaction](commands/zed.md#manage) and retention are all API-driven.
+
+Bite-sized components are unified by the Zed data, usually in the ZNG format:
+* All lake meta-data is available via meta-queries.
+* All like operations available through the service API are also available
+directly via the `zed` command.
+* Lake management is agent-driven through the API.  For example, instead of complex policies
+like data compaction being implemented in the core with some fixed set of
+algorithms and policies, an agent can simply hit the API to obtain the meta-data
+of the objects in the lake, analyze the objects (e.g., looking for too much
+key space overlap) and issue API commands to merge overlapping objects
+and delete the old fragmented objects, all with the transactional consistency
+of the commit log.
+* Components are easily tested and debugged in isolation.

versioned_docs/version-v1.15.0/commands/README.md

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+# Command Tooling
+
+The Zed system is managed and queried with the [`zed` command](zed.md),
+which is organized into numerous subcommands like the familiar command patterns
+of `docker` or `kubectrl`.
+Built-in help for the `zed` command and all of its subcommands is always
+accessible with the `-h` flag.
+
+The [`zq` command](zq.md) offers a convenient slice of `zed` for running
+stand-alone, command-line queries on inputs from files, HTTP URLs, or [S3](../integrations/amazon-s3.md).
+`zq` is like [`jq`](https://stedolan.github.io/jq/) but is easier and faster, utilizes the richer
+Zed data model, and interoperates with a number of other formats beyond JSON.
+If you don't need a Zed lake, you can install just the
+slimmer `zq` command which omits lake support and dev tools.
+
+`zq` is always installed alongside `zed`.  You might find yourself mixing and
+matching `zed` lake queries with `zq` local queries and stitching them
+all together with Unix pipelines.

versioned_docs/version-v1.15.0/commands/_category_.yaml

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+position: 3
+label: Commands