Replaced absolute URLs in docs with attributes

docs/Versions.asciidoc

@@ -16,6 +16,8 @@ release-state can be: released | prerelease | unreleased
 :plugins:         https://www.elastic.co/guide/en/elasticsearch/plugins/{branch}
 :javaclient:      https://www.elastic.co/guide/en/elasticsearch/client/java-api/{branch}
 :xpack:           https://www.elastic.co/guide/en/x-pack/5.0
+:logstash:        https://www.elastic.co/guide/en/logstash/{branch}
+:kibana:          https://www.elastic.co/guide/en/kibana/{branch}
 :issue:           https://github.com/elastic/elasticsearch/issues/
 :pull:            https://github.com/elastic/elasticsearch/pull/
 

docs/plugins/analysis-icu.asciidoc

@@ -336,7 +336,7 @@ PUT icu_sample
 Collations are used for sorting documents in a language-specific word order.
 The `icu_collation` token filter is available to all indices and defaults to
 using the
-https://www.elastic.co/guide/en/elasticsearch/guide/current/sorting-collations.html#uca[DUCET collation],
+{defguide}/sorting-collations.html#uca[DUCET collation],
 which is a best-effort attempt at language-neutral sorting.
 
 Below is an example of how to set up a field for sorting German names in

docs/plugins/discovery-ec2.asciidoc

@@ -313,7 +313,7 @@ Prefer https://aws.amazon.com/amazon-linux-ami/[Amazon Linux AMIs] as since Elas
 ===== Networking
 * Networking throttling takes place on smaller instance types in both the form of https://lab.getbase.com/how-we-discovered-limitations-on-the-aws-tcp-stack/[bandwidth and number of connections]. Therefore if large number of connections are needed and networking is becoming a bottleneck, avoid https://aws.amazon.com/ec2/instance-types/[instance types] with networking labeled as `Moderate` or `Low`.
 * Multicast is not supported, even when in an VPC; the aws cloud plugin which joins by performing a security group lookup.
-* When running in multiple http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html[availability zones] be sure to leverage https://www.elastic.co/guide/en/elasticsearch/reference/master/allocation-awareness.html[shard allocation awareness] so that not all copies of shard data reside in the same availability zone.
+* When running in multiple http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html[availability zones] be sure to leverage {ref}/allocation-awareness.html[shard allocation awareness] so that not all copies of shard data reside in the same availability zone.
 * Do not span a cluster across regions.  If necessary, use a tribe node.
 
 ===== Misc

docs/plugins/integrations.asciidoc

@@ -27,10 +27,10 @@ Integrations are not plugins, but are external tools or modules that make it eas
   Tiki has native support for Elasticsearch. This provides faster & better
   search (facets, etc), along with some Natural Language Processing features
   (ex.: More like this)
-  
+
 * http://extensions.xwiki.org/xwiki/bin/view/Extension/Elastic+Search+Macro/[XWiki Next Generation Wiki]:
   XWiki has an Elasticsearch and Kibana macro allowing to run Elasticsearch queries and display the results in XWiki pages using XWiki's scripting language as well as include Kibana Widgets in XWiki pages
- 
+
 [float]
 [[data-integrations]]
 === Data import/export and validation
@@ -41,13 +41,13 @@ releases 2.0 and later do not support rivers.
 [float]
 ==== Supported by Elasticsearch:
 
-* https://www.elastic.co/guide/en/logstash/current/plugins-outputs-elasticsearch.html[Logstash output to Elasticsearch]:
+* {logstash}/plugins-outputs-elasticsearch.html[Logstash output to Elasticsearch]:
   The Logstash `elasticsearch` output plugin.
-* https://www.elastic.co/guide/en/logstash/current/plugins-inputs-elasticsearch.html[Elasticsearch input to Logstash]
+* {logstash}/plugins-inputs-elasticsearch.html[Elasticsearch input to Logstash]
   The Logstash `elasticsearch` input plugin.
-* https://www.elastic.co/guide/en/logstash/current/plugins-filters-elasticsearch.html[Elasticsearch event filtering in Logstash]
+* {logstash}/plugins-filters-elasticsearch.html[Elasticsearch event filtering in Logstash]
   The Logstash `elasticsearch` filter plugin.
-* https://www.elastic.co/guide/en/logstash/current/plugins-codecs-es_bulk.html[Elasticsearch bulk codec]
+* {logstash}/plugins-codecs-es_bulk.html[Elasticsearch bulk codec]
   The Logstash `es_bulk` plugin decodes the Elasticsearch bulk format into individual events.
 
 [float]

docs/reference/getting-started.asciidoc

@@ -199,7 +199,7 @@ Now that we have our node (and cluster) up and running, the next step is to unde
 Let's start with a basic health check, which we can use to see how our cluster is doing. We'll be using curl to do this but you can use any tool that allows you to make HTTP/REST calls. Let's assume that we are still on the same node where we started Elasticsearch on and open another command shell window.
 
 To check the cluster health, we will be using the <<cat,`_cat` API>>. You can
-run the command below in https://www.elastic.co/guide/en/kibana/{branch}/console-kibana.html[Kibana's Console]
+run the command below in {kibana}/console-kibana.html[Kibana's Console]
 by clicking "VIEW IN CONSOLE" or with `curl` by clicking the "COPY AS CURL"
 link below and pasting it into a terminal.
 

docs/reference/redirects.asciidoc

@@ -60,14 +60,14 @@ directory.  Instead, mappings should be created using the API with:
 
 The `memcached` transport is no longer supported.  Instead use the REST
 interface over <<modules-http,HTTP>> or the
-https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/index.html[Java API].
+{javaclient}/index.html[Java API].
 
 [role="exclude",id="modules-thrift"]
 === Thrift
 
 The `thrift` transport is no longer supported.  Instead use the REST
 interface over <<modules-http,HTTP>> or the
-https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/index.html[Java API].
+{javaclient}/index.html[Java API].
 
 // QUERY DSL
 

docs/reference/search/request/preference.asciidoc

@@ -37,8 +37,7 @@ The `preference` is a query string parameter which can be set to:
 	preferences but it has to appear first: `_shards:2,3|_primary`
 
 `_only_nodes`::
-    Restricts the operation to nodes specified in node specification
+    Restricts the operation to nodes specified in <<cluster,node specification>>
-    https://www.elastic.co/guide/en/elasticsearch/reference/current/cluster.html
 
 Custom (string) value:: 
 	A custom value will be used to guarantee that

docs/reference/setup/install.asciidoc

@@ -29,7 +29,7 @@ Elasticsearch website or from our RPM repository.
 
 `docker`::
 
-An image is available for running Elasticsearch as a Docker container. It ships with https://www.elastic.co/guide/en/x-pack/current/index.html[X-Pack] pre-installed and may be downloaded from the Elastic Docker Registry.
+An image is available for running Elasticsearch as a Docker container. It ships with {xpack}/index.html[X-Pack] pre-installed and may be downloaded from the Elastic Docker Registry.
 +
 <<docker>>