X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=doc%2Fmkws-manual.markdown;h=1d654393e0781b156d7ea651cf30ab39d9723cc2;hb=f426841825d1f16c9080ad4fecb6c880ace9b521;hp=7c0dd06776f9ee11d35474c342d666c6aaf552d3;hpb=48c6fed7006336f607d90f58a5c2b9fdb0369686;p=mkws-moved-to-github.git

diff --git a/doc/mkws-manual.markdown b/doc/mkws-manual.markdown
index 7c0dd06..1d65439 100644
--- a/doc/mkws-manual.markdown
+++ b/doc/mkws-manual.markdown
@@ -41,7 +41,7 @@ flexibility against convenience:
   [Drupal](https://www.drupal.org/)
   sites.
 
-All of these approaches require programming to a greater or lesser
+All but the last of these approaches require programming to a greater or lesser
 extent. Against this backdrop, we introduced
 [MKWS (the MasterKey Widget Set)](http://mkws.indexdata.com/)
 -- a set of simple, very high-level HTML+CSS+JavaScript
@@ -171,22 +171,6 @@ is part of the `aux` team.
 Widgets that do not have a team specified (as in the examples above)
 are placed in the team called `AUTO`.
 
-Old and new-style class-names
------------------------------
-
-**NOTE.** Versions of MKWS before v1.0 used camel-case class-names:
-without hyphens and with second and subsequent words capitalised. So
-instead of `mkws-search`, it used to be `mkwsSearch`. And the classes
-used to specify team names used an `mkwsTeam_` prefix (with an
-underscore). So instead of `mkws-team-foo`, it used to be
-`mkwsTeam_foo`.
-
-The 1.x series of MKWS releases recognise these old-style class-names
-as well as the canonical ones, as a facility for backwards
-compatibility. However, **these old class-names are deprecated, and
-support will be removed in v2.0**. Existing applications that use them
-should be upgraded to the new-style class names as soon as convenient.
-
 Configuring widgets
 ===================
 
@@ -202,18 +186,16 @@ like this:
 	    lang_options: [ "en", "da" ]
 	    lang: "da",
 	    sort_default: "title",
-	    query_width: 60
 	  };
 	</script>
 	<script type="text/javascript" src="http://mkws.indexdata.com/mkws-complete.js"></script>
 
 This configuration restricts the set of available UI languages English
 and Danish (omitting German), sets the default to Danish (rather than
-the English), initially sorts search results by title rather than
-relevance (though as always this can be changed in the UI) and makes
-the search box a bit wider than the default.
+the English), and initially sorts search results by title rather than
+relevance (though as always this can be changed in the UI).
 
-The full set of supported configuration items is described in the
+The full set of supported configuration settings is described in the
 reference guide below.
 
 Per-widget configuration
@@ -221,7 +203,7 @@ Per-widget configuration
 
 In addition to the global configuration provided by the `mkws_config`
 object, individual widgets' behaviour can be configured by providing
-configuration items as attributed on their HTML elements. For example,
+configuration settings as attributes on their HTML elements. For example,
 a `records` widget might be restricted to displaying no more than
 three records by setting the `numrecs` parameter as follows:
 
@@ -238,11 +220,11 @@ attributes prefixed with `data-mkws-`, so:
 
 For first form is more convenient; the second is more correct.
 
-Because some configuration items take structured values rather than
+Because some configuration settings take structured values rather than
 simple strings, they cannot be directly provided by inline
 attributes. To allow for this, the special attribute
 `data-mkws-config`, if provided, is parsed as JSON and its key-value
-pairs set as configuration items for the widget in question. For
+pairs used as configuration settings for the widget in question. For
 example, the value of `lang_options` is an array of strings specifying
 which of the supported UI languages should be made available. The
 following invocation will limit this list to only English and Danish
@@ -267,7 +249,7 @@ etc., customised layouts may wish to treat each of these components
 separately. In this case, `mkws-results` can be omitted, and the
 following lower-level widgets provided instead:
 
-* `mkws-termlists` -- provides the facets
+* `mkws-facets` -- provides the facets
 
 * `mkws-ranking` -- provides the options for how records are sorted and
    how many are included on each page of results.
@@ -561,7 +543,7 @@ its own User Access record.
 When credential-based authentication is in use (username and
 password), it's necessary to pass these credentials into the Service
 Proxy when establishing the session. This is done 
-by setting the `sp_auth_credentials` configuration item to a string
+by providing the `sp_auth_credentials` configuration setting as a string
 containing the username and password separated by a slash:
 
 	mkws_config = { sp_auth_credentials: "mike/swordfish" };
@@ -590,9 +572,10 @@ yourname.com`:
 Step 1: add a rewriting authentication alias to the configuration:
 
 	RewriteEngine on
-	RewriteRule /spauth/ http://sp-mkws.indexdata.com/service-proxy/?command=auth&action=check,login&username=U&password=PW [P]
+	RewriteRule /spauth/ http://sp-mkws.indexdata.com/service-proxy/\
+		?command=auth&action=check,login&username=U&password=PW [P]
 
-Step 2: set the MKWS configuration item `service_proxy_auth` to
+Step 2: set the MKWS configuration setting `service_proxy_auth` to
 `http://yourname.com/spauth/`.
 
 Step 3: protect access to the local path `http://yourname.com/spauth/`
@@ -659,6 +642,9 @@ Name              Description
                   widget be subclassed to store the generated widget
                   definitions in more useful places.
 
+`button`          The search button. Usually generated a `search`
+                  widget.
+
 `categories`      Obtains from the Service Proxy a list of the target
                   categories associated with the library in use, and
                   displays them in a drop-down list. When a category
@@ -668,7 +654,7 @@ Name              Description
 `config`          This widget has no functionality of its own, but its
                   configuration is copied up into its team, allowing
                   it to affect other widgets in the team. This is the
-                  only way to set configuration items at the team
+                  only way to set configuration settings at the team
                   level.
 
 `console-builder` Like the `builder` widget, but emits the generated
@@ -699,154 +685,397 @@ Name              Description
                   be changed by overriding the `done` template using
                   `<script class="mkws-template-done" type="text/x-handlebars-template">`.
 
-`facet`           x
-
-`google-image`    x
-
-`images`          x
-
-`lang`            x
-
-`log`             x
-
-`lolcat`          x
-
-`motd-container`  x
-
-`motd`            x
-
-`navi`            x
-
-`pager`           x
-
-`per-page`        x
-
-`progress`        x
-
-`query`           x
-
-`ranking`         x
-
-`record`          x
-
-`records`         x
-
-`reference`       x
-
-`results`         x
+`facet`           A facet that displays the frequency with which a set
+                  of terms occur within a specific field. The specific
+                  field whose contents are analysed must be specified
+                  by the widget's `facet` configuration setting, which
+                  may conveniently be done by means of the
+                  `data-mkws-facet` attribute on the HTML
+                  element. The supported facets are "subject",
+                  "author" and "xtargets" -- the latter a special case
+                  which treats the target providing a record as a
+                  facet. Most often, `facet` widgets are generated
+                  by a `facets` widget, which knows which facets are
+                  required, but they can also be placed individually.
+
+`facets`          An area that contains a "Facets" heading and several
+                  `facet` widgets. The set of facet widgets generated
+                  is specified by the `facets` configuration setting,
+                  which may be set globally or at the level of the
+                  widget or the team. The value of this configuration
+                  setting is an array of zero or more strings, each
+                  naming a facet.
+
+`google-image`    A specialisation of the `images` widget which
+                  defaults to the `Google_Images` target.
+
+`images`          A specialisation of the `records` widget which
+                  defaults to the `images` template. Unlike the default
+                  summary template, this displays an image from the
+                  URL specified by the `md-thumburl` field of each
+                  record.
+
+`lang`            Provides a selection between the supported set of
+                  languages (which defaults to English, German and
+                  Danish, but can be configured by the `lang`
+                  configuration setting, whose value is an array of
+                  two-letter language codes).
+
+`log`             Initially empty, this widget accumulates a log of
+                  messages generated by the widget set, similar to
+                  those emitted on the JavaScript console.
+
+`lolcat`          A specialisation of the `google-image` widget which
+                  defaults to the search-term "kitteh" and
+                  auto-executes.
+
+`motd-container`  An empty container which the `motd` widget, if any,
+                  is moved into for initial display. Usually generated
+                  as part of the `results` widget.
+
+`motd`            May be provided, containing content to appear in the
+                  area where records will later appear. It is moved
+                  into this area (the `motd-container` widget) and
+                  initially displayed; then hidden when the first
+                  search is run. It can be used to provide a "message
+                  of the day".
+
+`navi`            Shows a list of the facets that have been selected,
+                  and allows them to be deselected.
+
+`pager`           Shows a list of the available pages of results, and
+                  allows the user to navigate to a selected page.
+
+`per-page`        Provides a dropdown allowing the user to choose how
+                  many records should appear on each page. The
+                  available set of page-sizes can be specified as the
+                  `perpage_options` configuration setting, whose value is
+                  an array of integers. The initial selected value can
+                  be specified by the `perpage_default` configuration setting.
+
+`progress`        Shows a progress bar which indicates how many of the
+                  targets have responded to the search.
+
+`query`           The input area for a query. Usually generated a `search`
+                  widget.
 
-`search-form`     x
+`ranking`         The result-ranking area, consisting of a `sort`
+                  widget and a `per-page` widget. These may instead
+                  be specified separately if preferred.
+
+`record`          A detailed display of a single record, usually
+                  appearing when the user clicks on a summary
+                  record. This is generated by the `records` widget.
+
+`records`         The area in which summary records appear. (Clicking
+                  on a summary record make it pop up as a detailed
+                  record.)
+
+`reference`       A short summary about a subject specified by the
+                  `autosearch` configuration setting. This is created by
+                  drawing a picture and a paragraph of text from
+                  Wikipedia. To work correctly, this widget must be
+                  used in a library that provides the
+                  `wikimedia_wikipedia_single_result` target.
+
+`results`         A large compound widget used to provide the most
+                  important results-oriented widgets in a pre-packaged
+                  framework: `facets`, `ranking`, `pager`, `navi` and
+                  `records`.
+
+`search-form`     The search form, containing the query area and the
+                  button. Usually generated a `search` widget.
+
+`search`          The search box, consisting of a form containing a
+                  query area and a button.
+
+`sort`            Provides a dropdown allowing the user to choose how
+                  the displayed records should be sorted. The
+                  available set of sort criteria can be specified as the
+                  `sort_options` configuration setting, whose value is
+                  an array of two-element arrays. The first item of
+                  each sub-array is a pazpar2 sort-expression such as
+                  `data:0` and the second is a human-readable label
+                  such as `newest`. The initial selected
+                  value can be specified by the `sort_default` configuration
+                  setting.
+
+`stat`            A summary line stating how many targets remain
+                  active, how many records have been found, and how
+                  many of them have been retrieved for display. For
+                  most purposes, the `progress` widget may be
+                  preferable.
+
+`summary`         A short record, included in the list shown when a
+                  search is run. When clicked, this generally pops up
+                  a detailed `record` widget. This widget is generated
+                  by the toolkit in response to search results.
+
+`switch`          A pair of buttons allowing the user to switch
+                  between viewing the search results (the usual case)
+                  or the target list.
+
+`targets`         A list of all targets in the present library,
+                  showing their ID, the number of records they have
+                  found for the current search, any diagnostics they
+                  have returned, the number of records that have been
+                  returned for display, and the connection state.
+----
 
-`search`          x
 
-`sort`            x
+Configuration settings
+----------------------
 
-`stat`            x
+Configuration settings may be provided at the level of a indiviual widget, or a team, or globally. Per-widget configuration is
+described above; per-team settings can be placed in a `config` widget belonging to the relevant team, and will be applied to that
+team as a whole; and global settings are provided in the global variable `mkws_config`. This structure is a key-value lookup
+table, and may specify the values of many settings.
 
-`switch`          x
+Some settings apply only to specific widgets; others to the behaviour of the tookit as a whole. When a widget does not itself have
+a value specified for a particular configuration setting, its team is consulted; and if that also does not have a value, the global
+settings are consulted. Only if this, too, is unspecified, is the default value used.
 
-`targets`         x
+The supported configuration settings are described in the table below. For those settings that apply only to particular widgets,
+the relevant widgets are listed. All entries are optional, but if specified must be given values of the specified type. Long
+default values are in footnotes to keep the table reasonably narrow.
 
-`termlists`       x
 ----
-
-
-Configuration object
---------------------
-
-The configuration object `mkws_config` may be created before including
-the MKWS JavaScript code to modify default behaviour. This structure
-is a key-value lookup table, whose entries are described in the table
-below. All entries are optional, but if specified must be given values
-of the specified type. If ommitted, each setting takes the indicated
-default value; long default values are in footnotes to keep the table
-reasonably narrow.
-
+Element                   Widget    Type    Default   Description
+--------                  ------    -----   --------- ------------
+auth_hostname             _global_  string            If provided, overrides the `pp2_hostname` setting when constructing the
+                                                      Service Proxy authentication URL. This need only be used when authentication
+                                                      is performed on a different host from the remaining operations (search,
+                                                      retrieve, etc.)
+
+autosearch                facet,    string            If provided, this setting contains a query which is immediately run on behalf
+                          facets,                     of the team. Often used with an [indirect setting](#indirect-settings).
+                          record,
+                          records,
+                          results
+
+facet                     facet     string            For a `facet` widget, this setting is mandatory, and indicates which field to
+                                                      list terms for. Three fields are supported: `subject`, `author` and
+                                                      `xtargets` -- the latter a special case which treats the target providing a
+                                                      record as a facet. Any other field may also be used, but the default caption
+                                                      and maximum term-count may not be appropriate, needing to be overridden by
+                                                      `facet_caption_*` and `facet_max_*` settings.
+
+facet_caption_*           facet     string            Specifies what on-screen caption is to be used for the named facet: for
+                                                      example, if a `date` facet is generated, then `facet_caption_date` can be
+                                                      used to set the caption to "Year".
+
+facet_max_*               facet     int               Specifies how many terms are to be displayed for the named facet: for
+                                                      example, if a `publisher` facet is generated, then `facet_max_publisher` can
+                                                      be used to limit the list to the top six.
+
+facets                    _team_    array   *Note 1*  Ordered list of names of facets to display.
+
+lang                      _team_    string            Two-letter ISO code of the default language to display the UI in. Supported
+                                                      language codes are `en` = English, `de` = German, `da` = Danish, and whatever
+                                                      additional languages are configured using `language_*` entries (see below).
+
+lang_options              lang      array   []        A list of the languages to offer as options. If empty (the default), then all
+                                                      configured languages are listed.
+
+language_*                _global_  hash              Support for any number of languages can be added by providing entries whose
+                                                      name is `language_` followed by the code of the language. See the separate
+                                                      section below for details.
+
+limit                     facet,    string            Allows a partial search to be included in the specification of an
+                          facets,                     auto-executing widget. This is ANDed with the submitted query, as though it
+                          record,                     had been selected from a facet. See the Search section in [the Protocol
+                          records,                    chapter of the Pazpar2 manual
+                          results                     ](http://www.indexdata.com/pazpar2/doc/pazpar2_protocol.html)
+
+log_level                 _global_  int     1         Level of debugging output to emit. 0 = none, 1 = messages, 2 = messages with
+                                                      datestamps, 3 = messages with datestamps and stack-traces.
+
+maxrecs                   facet,    int               Limits the metasearching middleware to retrieving no more than the specified
+                          facets,                     number of records from each target.
+                          record,
+                          records,
+                          results
+
+paragraphs                reference int               Limits the number of paragraphs rendered to the specified number. If
+                                                      omitted, there is no limit.
+
+pazpar2_url               _global_  string            If specified, this is the URL used to access the metasearch middleware. This
+                                                      service must be configured to provide search results, facets, etc. It may be
+                                                      either unmediated Pazpar2 or the MasterKey Service Proxy, which mediates
+                                                      access to an underlying Pazpar2 instance. When not specified, the URL is
+                                                      assembled from `pp2_hostname` and `pp2_path`. See the [Assembling Pazpar2
+                                                      URLs](#assembling-pazpar2-urls) section below.
+
+perpage                   facet,    int               Specifies the number of records to show per page in an auto-executing
+                          facets,                     widget. Contrast with `perpage_default`, which is used to prime the dropdown
+                          record,                     with which a user chooses the page-size in an interactive session.
+                          records,
+                          results
+
+perpage_default           _team_    string  20        The initial value for the number of records to show on each page.
+
+perpage_options           ranking   array   *Note 2*  A list of candidate page sizes. Users can choose between these to determine
+                                                      how many records are displayed on each page of results.
+
+pp2_hostname              _global_  string  *Note 3*  Unless overridden by the `pazpar2_url` setting, this is used together with
+                                                      `pp2_path` to construct the URL to the Pazpar2 service (or Service
+                                                      Proxy). Set this to connect to a service on a different host from the
+                                                      default.
+
+pp2_path                  _global_  string  *Note 4*  Unless overridden by the `pazpar2_url` setting, this is used together with
+                                                      `pp2_hostname` to construct the URL to the Pazpar2 service (or Service
+                                                      Proxy). Set this to connect to a service on a different host from the
+                                                      default.
+
+scan_all_nodes            _global_  bool    false     An internal setting that changes how MKWS scans the HTML documen to discover
+                                                      widgets. If set to true, a different approach is used which may be faster
+                                                      under some circumstances.
+
+sentences                 reference int               Limits the number of sentences rendered to the specified number. If
+                                                      omitted, there is no limit.
+
+service_proxy_auth        _global_  url               If defined, this is the URL which, when `use_service_proxy` is true, is
+                                                      fetched once at the beginning of each session to authenticate the user and
+                                                      establish a session that encompasses a defined set of targets to search
+                                                      in. When not defined, the URL is assembled from `auth_hostname` or
+                                                      `pp2_hostname`, `pp2_path` or `sp_auth_path`, `sp_auth_query` and
+                                                      `sp_auth_credentials`. See the [Assembling Pazpar2
+                                                      URLs](#assembling-pazpar2-urls) section below.
+
+service_proxy_auth_domain _global_  domain            When the server used for authentication -- e.g. the one identified by the
+                                                      `service_proxy_auth` URL -- proxies for different server, this can be set to
+                                                      the domain of the server that it proxies for, so that cookies are rewritten
+                                                      to appear to be from this domain.
+
+show_lang                lang       bool    true      Indicates whether or not to display the language menu.
+
+show_perpage             ranking    bool    true      Indicates whether or not to display the perpage menu.
+
+show_sort                ranking    bool    true      Indicates whether or not to display the sort menu.
+
+show_switch              switch     bool    true      Indicates whether or not to display the switch menu.
+
+sort                      facet,    string            Specifies the order in which to sort the records retrieved by an
+                          facets,                     auto-executing widget. Must be one of those in the `sort_options`
+                          record,                     array. Contrast with `sort_default`, which is used to prime the dropdown
+                          records,                    with which a user chooses the sortorder in an interactive session.
+                          results
+
+sort_default              _team_    string  relevance The default sort criterion to use. Must be one of those in the
+                                                      `sort_options` array.
+
+sort_options              ranking   array   *Note 5*  List of supported sort criteria. Each element of the list is itself a
+                                                      two-element list: the first element of each sublist is a pazpar2
+                                                      sort-expression such as `data:0` and the second is a human-readable label
+                                                      such as `newest`.
+
+sp_auth_credentials       _global_  string            If defined, this must be a slash-separated combination of username and
+                                                      password, which is sent as the authentication credentials on session
+                                                      initialisation. See the [Assembling Pazpar2 URLs](#assembling-pazpar2-urls)
+                                                      section below.
+
+sp_auth_path              _global_  string            Part of the URL used for authentication. See the [Assembling Pazpar2
+                                                      URLs](#assembling-pazpar2-urls) section below.
+
+sp_auth_query             _global_  string  *Note 6*  Part of the URL used for authentication. See the [Assembling Pazpar2
+                                                      URLs](#assembling-pazpar2-urls) section below.
+
+target                    facet,    string            One of three ways to select which targets an auto-searching widgets uses. See
+                          facets,                     the [Choosing targets from the library](#choosing-targets-from-the-library)
+                          record,                     section above.
+                          records,
+                          results
+
+targetfilter              facet,    string            One of three ways to select which targets an auto-searching widgets uses. See
+                          facets,                     the [Choosing targets from the library](#choosing-targets-from-the-library)
+                          record,                     section above.
+                          records,
+                          results
+
+targets                   facet,    string            One of three ways to select which targets an auto-searching widgets uses. See
+                          facets,                     the [Choosing targets from the library](#choosing-targets-from-the-library)
+                          record,                     section above.
+                          records,
+                          results
+
+template                  details,  string            Numerous widgets use Handlebars templates to render HTML. In general, each
+                          done,                       of these by default uses a template with the same name as the widget
+                          facet,                      itself. Individual widgets can be customised to use a template of a
+                          facets,                     different name by means of their `template` setting. The `records` widget
+                          images,                     (and `record`, an equivalent that shows only a single record) use the
+                          lang,                       `summary` template as well as the `records` template.
+                          navi,
+                          pager,
+                          progress,
+                          ranking,
+                          records,
+                          reference,
+                          results,
+                          search,
+                          stat,
+                          switch,
+                          targets
+
+text                      builder   string  "Build!"  Specifies what text to use for the Builder button.
+
+use_service_proxy         _global_  bool    true      If true, then a Service Proxy is used to deliver searching services rather
+                                                      than raw Pazpar2. An authentication phase is run during initialisation.
 ----
-Element                   Type    Default   Description
---------                  -----   --------- ------------
-log_level                 int     1         Level of debugging output to emit. 0 = none, 1 = messages, 2 = messages with
-                                            datestamps, 3 = messages with datestamps and stack-traces.
-
-facets                    array   *Note 1*  Ordered list of names of facets to display. Supported facet names are
-                                            `xtargets`, `subject` and `author`.
-
-lang                      string  en        Code of the default language to display the UI in. Supported language codes are `en` =
-                                            English, `de` = German, `da` = Danish, and whatever additional languages are configured
-                                            using `language_*` entries (see below).
-
-lang_options              array   []        A list of the languages to offer as options. If empty (the default), then all
-                                            configured languages are listed.
-
-language_*                hash              Support for any number of languages can be added by providing entries whose name is
-                                            `language_` followed by the code of the language. See the separate section below for
-                                            details.
 
-pazpar2_url               string  *Note 2*  The URL used to access the metasearch middleware. This service must be configured to
-                                            provide search results, facets, etc. It may be either unmediated or Pazpar2 the
-                                            MasterKey Service Proxy, which mediates access to an underlying Pazpar2 instance. In
-                                            the latter case, `service_proxy_auth` must be provided.
+The `show_lang`, `show_perpage`, `show_sort` and `show_switch` configuration settings are technically redundant, as the relevant
+widgets, like all widgets, are displayed only when they are provided. But they are retained as an easier route to lightly
+customise the display than by providing a full HTML structure.
 
-perpage_default           string  20        The initial value for the number of records to show on each page.
-
-perpage_options           array   *Note 3*  A list of candidate page sizes. Users can choose between these to determine how many
-                                            records are displayed on each page of results.
+### Notes
 
-query_width               int     50        The width of the query box, in characters.
+1. The default for `facets` is `["xtargets", "subject", "author"]`
 
-responsive_design_width   int               If defined, then the facets display moves between two locations as the screen-width
-                                            varies, as described above. The specified number is the threshhold width, in pixels,
-                                            at which the facets move between their two locations.
+2. The default for `perpage_options` is `[10, 20, 30, 50]`
 
-service_proxy_auth        url     *Note 4*  A URL which, when `use_service_proxy` is true, is fetched once at the beginning of each
-                                            session to authenticate the user and establish a session that encompasses a defined set
-                                            of targets to search in.
+3. The default for `pp2_hostname` is `"sp-mkws.indexdata.com"`
 
-service_proxy_auth_domain domain            Can be set to the domain for which `service_proxy_auth` proxies authentication, so
-                                            that cookies are rewritten to appear to be from this domain. In general, this is not
-                                            necessary, as this setting defaults to the domain of `pazpar2_url`.
+4. The default for `pp2_path` is `"service-proxy/"`
 
-show_lang                 bool    true      Indicates whether or not to display the language menu.
+5. The default for `sort_options` is `[["relevance"], ["title:1", "title"], ["date:0", "newest"], ["date:1", "oldest"]]`
 
-show_perpage              bool    true      Indicates whether or not to display the perpage menu.
+6. The default for `sp_auth_query` is `"command=auth&action=perconfig"`
 
-show_sort                 bool    true      Indicates whether or not to display the sort menu.
+### Indirect settings
 
-show_switch               bool    true      Indicates whether or not to display the switch menu, for switching between showing
-                                            retrieved records and target information.
+The values of any setting are generally interpreted literally. However, it is possible to specify a value indirectly -- for
+example, by reference to a query parameter -- and this is often useful in contexts such as specifying an autosearch
+query. Settings of this kind have values beginning with an exclamation mark, and take the form `!`_type_`!`_value_.
 
-sort_default              string  relevance The label of the default sort criterion to use. Must be one of those in the `sort`
-                                            array.
+The currently supported types are:
 
-sort_options              array   *Note 6*  List of supported sort criteria. Each element of the list is itself a two-element list:
-                                            the first element of each sublist is a pazpar2 sort-expression such as `data:0` and
-                                            the second is a human-readable label such as `newest`.
+* `param` -- uses the value of the specified query parameter for the URL. For example
+`<div class="mkws-results" autosearch="!param!term">` will auto-search for the word "sushi" if the page containing that widget is
+invoked from the URL `http://example.com/magic/example.html?term=sushi`
 
-use_service_proxy         bool    true      If true, then a Service Proxy is used to deliver searching services rather than raw
-                                            Pazpar2.
-----
+* `path` -- uses the value of the _n_th component of the URL path, as specified by the value. For example
+`!path!3` will auto-search for the word "dinosaur" if the page containing that widget is
+invoked from the URL `http://example.com/magic/lookup/dinosaur`
 
-Perhaps we should get rid of the `show_lang`, `show_perpage`,
-`show_sort` and `show_switch` configuration items, and simply display the relevant menus
-only when their containers are provided -- e.g. an `mkws-lang` element
-for the language menu. But for now we retain these, as an easier route
-to lightly customise the display than my changing providing a full HTML
-structure.
-
-### Notes
+* `var` -- uses the value of the named JavaScript global variable. This is a very powerful and general mechanism. For example, to
+  search for the reversed value of the query parameter called `reverseTerm`, you might write a JavaScript function to do the
+  extraction and reversing, the use the HTML:
 
-1. ["sources", "subjects", "authors"]
+<!--- Due to a bug in pandoc, we need this comment to force the following code-block to be recognised -->
 
-2. /pazpar2/search.pz2
+		<script>var _reversedParam = extractAndReverse("term");</script>
+		<div class="mkws-results" autosearch="!var!_reversedParam">
 
-3. [10, 20, 30, 50]
+### Assembling Pazpar2 URLs
 
-4. http://sp-mkws.indexdata.com/service-proxy-auth
+Most of MKWS's functionality is achieved by use of the Pazpar2 middleware. This is accessed on an endpoint URL which is usually
+assembled from the two configuration sessings `pp2_hostname` and `pp2_path`. However, if for some reason an unusual Pazpar2
+endpoint must be used, that endpoint can be specified in the `pazpar2_url` setting, and that will be used instead.
 
-5. http://sp-mkws.indexdata.com/service-proxy/
-
-6. [["relevance"], ["title:1", "title"], ["date:0", "newest"], ["date:1", "oldest"]]
+In the common case where Pazpar2 is accessed via the Service Proxy, an authentication call is made during initialisation. The call
+is generally made to the same endpoint as the other requests. However, 
 
+and how `service_proxy_auth` is assembled from
+`auth_hostname` or `pp2_hostname`, `sp_auth_path`, `sp_auth_query` and `sp_auth_credentials`.
 
 Language specification
 ----------------------
@@ -874,7 +1103,7 @@ The following strings occurring in the UI can be translated:
 `Search`,
 `Sort by`,
 `Targets`,
-`Termlists`,
+`Facets`,
 `and show`,
 `found`,
 `of`,
@@ -913,7 +1142,7 @@ from that toolkit. The relevant lines are:
 	      href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
 
 	<div class="mkws-search"></div>
-	<div class="mkws-popup" popup_width="1024" popup_height="650" popup_modal="0" popup_autoOpen="0" popup_button="input.mkwsButton">
+	<div class="mkws-popup" popup_width="1024" popup_height="650" popup_autoOpen="0">
 	  <div class="mkws-switch"></div>
 	  <div class="mkws-lang"></div>
 	  <div class="mkws-results"></div>
@@ -949,7 +1178,7 @@ In order to override the default CSS styles provided by the MasterKey Widget
 Set, it's necessary to understand that structure of the HTML elements that are
 generated within the widgets. This knowledge make it possible, for example,
 to style each `<div>` with class `term` but only when it occurs inside an
-element with class `mkws-termlists`, so as to avoid inadvertently styling other
+element with class `mkws-facets`, so as to avoid inadvertently styling other
 elements using the same class in the non-MKWS parts of the page.
 
 The HTML structure is as follows. As in CSS, #ID indicates a unique identifier
@@ -1012,6 +1241,30 @@ and .CLASS indicates an instance of a class.
 	  span.clients
 	  span.records
 
+
+Appendix: compatibility roadmap
+===============================
+
+FIXME: more to write here.
+
+
+Old and new-style class-names
+-----------------------------
+
+**NOTE.** Versions of MKWS before v1.0 used camel-case class-names:
+without hyphens and with second and subsequent words capitalised. So
+instead of `mkws-search`, it used to be `mkwsSearch`. And the classes
+used to specify team names used an `mkwsTeam_` prefix (with an
+underscore). So instead of `mkws-team-foo`, it used to be
+`mkwsTeam_foo`.
+
+The 1.x series of MKWS releases recognise these old-style class-names
+as well as the canonical ones, as a facility for backwards
+compatibility. However, **these old class-names are deprecated, and
+support will be removed in v2.0**. Existing applications that use them
+should be upgraded to the new-style class names as soon as convenient.
+
+
 - - -
 
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