diff --git a/README.md b/README.md index 0864166..a338662 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,6 @@ # SHACL Form Generator -``` +```console npm i @ulb-darmstadt/shacl-form ``` @@ -9,6 +9,7 @@ An HTML5 web component for editing/viewing [RDF](https://www.w3.org/RDF/) data t ## [See demo here](https://ulb-darmstadt.github.io/shacl-form/) ### Basic usage + ```html @@ -38,8 +39,8 @@ An HTML5 web component for editing/viewing [RDF](https://www.w3.org/RDF/) data t form.addEventListener('change', event => { // check if form data validates according to the SHACL shapes if (event.detail?.valid) { - // get data graph as RDF triples (default format is 'text/turtle') - // and log them to the browser console + // get data graph as RDF triples and + // log them to the browser console const triples = form.serialize() console.log('entered form data', triples) // store the data somewhere, e.g. in a triple store @@ -51,6 +52,7 @@ An HTML5 web component for editing/viewing [RDF](https://www.w3.org/RDF/) data t ``` ### Element attributes + Attribute | Description ---|--- data-shapes | SHACL shape definitions (e.g. a turtle string) to generate the form from @@ -62,16 +64,17 @@ data-value-subject | The subject (id) of the generated data. If this is not set, data-language | Language to use if shapes contain langStrings, e.g. in `sh:name` or `rdfs:label`. Default is [`navigator.language`](https://www.w3schools.com/jsref/prop_nav_language.asp) data-loading | Text to display while the web component is initializing. Default: `"Loading..."` data‑ignore‑owl‑imports | By default, `owl:imports` URLs are fetched and the resulting RDF triples are added to the shapes graph. Setting this attribute to any value disables this feature -data-mode | When set to `"view"`, turns the web component into a viewer that displays the given data graph without editing functionality -data-collapse | When this attribute is present, `sh:group`s and properties with `sh:node` and `sh:maxCount` > 1 are displayed in a collapsible accordion-like widget to reduce visual complexity of the form. The collapsible element is initially shown closed, except when this attribute's value is `"open"` -data-submit-button | [Only used in edit mode] Whether to add a submit button to the form. The value of this attribute is used as the button label. `submit` events will only fire after successful validation +data-view | When set, turns the web component into a viewer that displays the given data graph without editing functionality +data-collapse | When set, `sh:group`s and properties with `sh:node` and `sh:maxCount` != 1 are displayed in a collapsible accordion-like widget to reduce visual complexity of the form. The collapsible element is initially shown closed, except when this attribute's value is `"open"` +data-submit-button | [Ignored when `data-view` attribute is set] Whether to add a submit button to the form. The value of this attribute is used as the button label. `submit` events get emitted only when the form data validates ### Element functions + ```typescript serialize(format?: string): string ``` -Serializes the form data to RDF triples. Supported formats: `text/turtle` (default), `application/ld+json`, `application/n-triples`, `application/n-quads`, `application/trig`. +Serializes the form data to RDF triples. Supported formats: `text/turtle` (default), `application/ld+json`, `application/n-triples`, `application/n-quads`, `application/trig`. ```typescript validate(ignoreEmptyValues: boolean): Promise @@ -86,7 +89,7 @@ Register a [plugin](./src/plugin.ts) to customize editing/viewing certain proper ```typescript setTheme(theme: Theme) ``` -Set a design theme to use for rendering. See section "Theming" below. +Set a design theme to use for rendering. See section [Theming](#Theming). ```typescript setClassInstanceProvider((className: string) => Promise) ``` @@ -96,13 +99,117 @@ Sets a callback function that is called when a SHACL property has an `sh:class` Class hierarchies can be built using `rdfs:subClassOf` or `skos:broader`. -## Theming -`` comes in 3 different bundles, each providing a specific theme: +## Features + +### Data graph binding + +`` requires only a shapes graph as input via the attribute `data-shapes` (or `data-shapes-url`) to generate an empty form and create new RDF data from the form input fields. Using the attributes `data-values` (or `data-values-url`) and `data-value-subject`, you can also bind an existing data graph to the form. The given data graph is then used to fill the form input fields. + +### Viewer mode + +`` not only is an RDF data editor, but can also be used as a viewer by setting attribute `data-view` and binding both, a shapes and a data graph. See the [demo](https://ulb-darmstadt.github.io/shacl-form/#viewer-mode) for an example. + +### Providing additional data to the shapes graph + +Apart from setting the element attributes `data-shapes` or `data-shapes-url`, there are two ways of adding RDF data to the shapes graph: +1. While parsing the triples of the shapes graph, any encountered `owl:imports` predicate that has a valid HTTP URL value will tried to be fetched with the HTTP Accept header set to all of the [supported](#formats) MIME types. A successful response will be parsed and added to the shapes graph. The [example shapes graph](https://ulb-darmstadt.github.io/shacl-form/#example) contains the following triples: + ``` + example:Attribution + owl:imports ; + sh:property [ + sh:name "Role" ; + sh:path dcat:hadRole ; + sh:class prov:Role ; + ] . + ``` + In this case, the URL references an ontology which among other things defines instances of class `prov:Role` that are then used to populate the "Role" dropdown in the form. + +2. The `` element has a function `setClassInstanceProvider((className: string) => Promise)` that registers a callback function which is called when a SHACL property has +an `sh:class` predicate. The expected return value of this callback function is a (promise of a) string (e.g. in format `text/turtle`) that contains RDF class instance definitions of the given class. Instances can be defined e.g. like: + - `example:Instance a example:Class` + - `example:Instance a owl:NamedIndividual; skos:broader example:Class` + + Class hierarchies can be built using `rdfs:subClassOf` or `skos:broader`. + + In [this example](https://ulb-darmstadt.github.io/shacl-form/#example), the code: + + ```typescript + form.setClassInstanceProvider((clazz) => { + if (clazz === 'http://example.org/Material') { + return ` + a ; "Steel". + a ; "Wood". + a ; "Alloy". + a ; "Plaster". + ` + } + ) + ``` + returns instances of the class `http://example.org/Material` that are then used to populate the "Artwork material" dropdown in the form. + + A more realistic use case of this feature is calling some API endpoint to fetch class instance definitions from existing ontologies. + +### SHACL "or" constraint + +`` supports using [sh:or](https://www.w3.org/TR/shacl/#OrConstraintComponent) to let users select between different options on nodes or properties. +The [example shapes graph](https://ulb-darmstadt.github.io/shacl-form/#example) has the following triples: +``` +example:Attribution + a sh:NodeShape ; + sh:property [ + sh:maxCount 1 ; + sh:minCount 1 ; + sh:path prov:agent ; + sh:or ( + [ sh:node example:Person ; rdfs:label "Person" ] + [ sh:node example:Organisation ; rdfs:label "Organisation" ] + ) + ] . +``` +When adding a new attribution, `` renders a dropdown to let the user select between the two options Person/Organisation. After selecting one of the options, the dropdown is replaced by the input fields of the selected node shape. + +When binding an existing data graph to the form, the `sh:or` constraint is tried to be resolved depending on the respective data value: +- For RDF literals, an `sh:or` option with a matching `sh:datatype` is chosen +- For blank nodes or named nodes, the `rdf:type` of the value is tried to be matched with a node shape having a corresponding `sh:targetClass` or with a property shape having a corresponding `sh:class` + +### SHACL shape inheritance + +SHACL defines two ways of inheriting shapes: [sh:and](https://www.w3.org/TR/shacl/#AndConstraintComponent) +and [sh:node](https://www.w3.org/TR/shacl/#NodeConstraintComponent). `` supports both. In [this example](https://ulb-darmstadt.github.io/shacl-form/#example), node shape `example:ArchitectureModelDataset` extends `example:Dataset` by defining the following RDF triple: + +``` +example:ArchitectureModelDataset sh:node example:Dataset . +``` + +Properties of inherited shapes are displayed first. + +### Plugins + +Plugins can modify rendering of the form and add functionality to edit and view certain RDF datatypes or predicates (or a combination of both). As an example, the JavaScript of [this page](https://ulb-darmstadt.github.io/shacl-form/#example) contains the following code: +```typescript +import { MapboxPlugin } from '@ulb-darmstadt/shacl-form/plugins/mapbox.js' +const form = document.getElementById("shacl-form") +form.registerPlugin(new MapboxPlugin({ datatype: 'http://www.opengis.net/ont/geosparql#wktLiteral' }, API_KEY)) +``` +In effect, whenever a SHACL property has an `sh:datatype` of `http://www.opengis.net/ont/geosparql#wktLiteral`, the plugin is called to create the editor and/or viewer HTML elements. This specific plugin uses [Mapbox GL](https://docs.mapbox.com/mapbox-gl-js/guides/) to edit or view geometry in format [well known text](http://giswiki.org/wiki/Well_Known_Text) on a map. +Custom plugins can be built by extending class [Plugin](https://github.com/ULB-Darmstadt/shacl-form/blob/main/src/plugin.ts#L40). + +### Property grouping and collapsing + +Properties can be grouped using [sh:group](https://www.w3.org/TR/shacl/#group) in the shapes graph. [This example](https://ulb-darmstadt.github.io/shacl-form/#example) defines a group "Physical properties" and assigns certain properties to it. + +When the element attribute `data-collapse` is set, `` creates an accordion-like widget that toggles the visibility of grouped properties in order to reduce the visual complexity of the form. If the grouped properties should initially be shown, set `data-collapse="open"`. + +Apart from grouped properties, all properties having an `sh:node` predicate and `sh:maxCount` != 1 are collapsed. + +### Theming + +`` comes in 3 different bundles, each providing a specific theme. See the [demo page](https://ulb-darmstadt.github.io/shacl-form/#theming) for an example. Theme | Import statement --- | --- -Default (slightly customized default browser styles) | `import '@ulb-darmstadt/shacl-form/form-default.js'` +[Default]((./src/themes/default.ts)) (slightly customized default browser styles) | `import '@ulb-darmstadt/shacl-form/form-default.js'` [Bootstrap](./src/themes/bootstrap.ts) [alpha status] | `import '@ulb-darmstadt/shacl-form/form-bootstrap.js'` [Material Design](./src/themes/material.ts) [alpha status] | `import '@ulb-darmstadt/shacl-form/form-material.js'` -Custom themes can be employed by extending class [Theme](./src/theme.ts), then calling function `setTheme()` on the `` element. \ No newline at end of file +Custom themes can be employed by extending class [Theme](./src/theme.ts), then calling function `setTheme()` on the `` element. diff --git a/demo/index.html b/demo/index.html index 8815feb..5508c24 100644 --- a/demo/index.html +++ b/demo/index.html @@ -16,10 +16,10 @@ } - - + + @@ -29,7 +29,7 @@

<shacl-form> demo

Basic usage Data types - Complex example + Example Viewer mode Theming Try your own @@ -71,9 +71,6 @@

<shacl-form> demo

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