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document.proto
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document.proto
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// Copyright 2021 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
syntax = "proto3";
package google.cloud.documentai.v1;
import "google/api/field_behavior.proto";
import "google/cloud/documentai/v1/geometry.proto";
import "google/protobuf/timestamp.proto";
import "google/rpc/status.proto";
import "google/type/color.proto";
import "google/type/date.proto";
import "google/type/datetime.proto";
import "google/type/money.proto";
import "google/type/postal_address.proto";
import "google/api/annotations.proto";
option csharp_namespace = "Google.Cloud.DocumentAI.V1";
option go_package = "google.golang.org/genproto/googleapis/cloud/documentai/v1;documentai";
option java_multiple_files = true;
option java_outer_classname = "DocumentProto";
option java_package = "com.google.cloud.documentai.v1";
option php_namespace = "Google\\Cloud\\DocumentAI\\V1";
option ruby_package = "Google::Cloud::DocumentAI::V1";
// Document represents the canonical document resource in Document Understanding
// AI.
// It is an interchange format that provides insights into documents and allows
// for collaboration between users and Document Understanding AI to iterate and
// optimize for quality.
message Document {
// For a large document, sharding may be performed to produce several
// document shards. Each document shard contains this field to detail which
// shard it is.
message ShardInfo {
// The 0-based index of this shard.
int64 shard_index = 1;
// Total number of shards.
int64 shard_count = 2;
// The index of the first character in [Document.text][google.cloud.documentai.v1.Document.text] in the overall
// document global text.
int64 text_offset = 3;
}
// Annotation for common text style attributes. This adheres to CSS
// conventions as much as possible.
message Style {
// Font size with unit.
message FontSize {
// Font size for the text.
float size = 1;
// Unit for the font size. Follows CSS naming (in, px, pt, etc.).
string unit = 2;
}
// Text anchor indexing into the [Document.text][google.cloud.documentai.v1.Document.text].
TextAnchor text_anchor = 1;
// Text color.
google.type.Color color = 2;
// Text background color.
google.type.Color background_color = 3;
// Font weight. Possible values are normal, bold, bolder, and lighter.
// https://www.w3schools.com/cssref/pr_font_weight.asp
string font_weight = 4;
// Text style. Possible values are normal, italic, and oblique.
// https://www.w3schools.com/cssref/pr_font_font-style.asp
string text_style = 5;
// Text decoration. Follows CSS standard.
// <text-decoration-line> <text-decoration-color> <text-decoration-style>
// https://www.w3schools.com/cssref/pr_text_text-decoration.asp
string text_decoration = 6;
// Font size.
FontSize font_size = 7;
}
// A page in a [Document][google.cloud.documentai.v1.Document].
message Page {
// Dimension for the page.
message Dimension {
// Page width.
float width = 1;
// Page height.
float height = 2;
// Dimension unit.
string unit = 3;
}
// Rendered image contents for this page.
message Image {
// Raw byte content of the image.
bytes content = 1;
// Encoding mime type for the image.
string mime_type = 2;
// Width of the image in pixels.
int32 width = 3;
// Height of the image in pixels.
int32 height = 4;
}
// Representation for transformation matrix, intended to be compatible and
// used with OpenCV format for image manipulation.
message Matrix {
// Number of rows in the matrix.
int32 rows = 1;
// Number of columns in the matrix.
int32 cols = 2;
// This encodes information about what data type the matrix uses.
// For example, 0 (CV_8U) is an unsigned 8-bit image. For the full list
// of OpenCV primitive data types, please refer to
// https://docs.opencv.org/4.3.0/d1/d1b/group__core__hal__interface.html
int32 type = 3;
// The matrix data.
bytes data = 4;
}
// Visual element describing a layout unit on a page.
message Layout {
// Detected human reading orientation.
enum Orientation {
// Unspecified orientation.
ORIENTATION_UNSPECIFIED = 0;
// Orientation is aligned with page up.
PAGE_UP = 1;
// Orientation is aligned with page right.
// Turn the head 90 degrees clockwise from upright to read.
PAGE_RIGHT = 2;
// Orientation is aligned with page down.
// Turn the head 180 degrees from upright to read.
PAGE_DOWN = 3;
// Orientation is aligned with page left.
// Turn the head 90 degrees counterclockwise from upright to read.
PAGE_LEFT = 4;
}
// Text anchor indexing into the [Document.text][google.cloud.documentai.v1.Document.text].
TextAnchor text_anchor = 1;
// Confidence of the current [Layout][google.cloud.documentai.v1.Document.Page.Layout] within context of the object this
// layout is for. e.g. confidence can be for a single token, a table,
// a visual element, etc. depending on context. Range [0, 1].
float confidence = 2;
// The bounding polygon for the [Layout][google.cloud.documentai.v1.Document.Page.Layout].
BoundingPoly bounding_poly = 3;
// Detected orientation for the [Layout][google.cloud.documentai.v1.Document.Page.Layout].
Orientation orientation = 4;
}
// A block has a set of lines (collected into paragraphs) that have a
// common line-spacing and orientation.
message Block {
// [Layout][google.cloud.documentai.v1.Document.Page.Layout] for [Block][google.cloud.documentai.v1.Document.Page.Block].
Layout layout = 1;
// A list of detected languages together with confidence.
repeated DetectedLanguage detected_languages = 2;
// The history of this annotation.
Provenance provenance = 3;
}
// A collection of lines that a human would perceive as a paragraph.
message Paragraph {
// [Layout][google.cloud.documentai.v1.Document.Page.Layout] for [Paragraph][google.cloud.documentai.v1.Document.Page.Paragraph].
Layout layout = 1;
// A list of detected languages together with confidence.
repeated DetectedLanguage detected_languages = 2;
// The history of this annotation.
Provenance provenance = 3;
}
// A collection of tokens that a human would perceive as a line.
// Does not cross column boundaries, can be horizontal, vertical, etc.
message Line {
// [Layout][google.cloud.documentai.v1.Document.Page.Layout] for [Line][google.cloud.documentai.v1.Document.Page.Line].
Layout layout = 1;
// A list of detected languages together with confidence.
repeated DetectedLanguage detected_languages = 2;
// The history of this annotation.
Provenance provenance = 3;
}
// A detected token.
message Token {
// Detected break at the end of a [Token][google.cloud.documentai.v1.Document.Page.Token].
message DetectedBreak {
// Enum to denote the type of break found.
enum Type {
// Unspecified break type.
TYPE_UNSPECIFIED = 0;
// A single whitespace.
SPACE = 1;
// A wider whitespace.
WIDE_SPACE = 2;
// A hyphen that indicates that a token has been split across lines.
HYPHEN = 3;
}
// Detected break type.
Type type = 1;
}
// [Layout][google.cloud.documentai.v1.Document.Page.Layout] for [Token][google.cloud.documentai.v1.Document.Page.Token].
Layout layout = 1;
// Detected break at the end of a [Token][google.cloud.documentai.v1.Document.Page.Token].
DetectedBreak detected_break = 2;
// A list of detected languages together with confidence.
repeated DetectedLanguage detected_languages = 3;
// The history of this annotation.
Provenance provenance = 4;
}
// Detected non-text visual elements e.g. checkbox, signature etc. on the
// page.
message VisualElement {
// [Layout][google.cloud.documentai.v1.Document.Page.Layout] for [VisualElement][google.cloud.documentai.v1.Document.Page.VisualElement].
Layout layout = 1;
// Type of the [VisualElement][google.cloud.documentai.v1.Document.Page.VisualElement].
string type = 2;
// A list of detected languages together with confidence.
repeated DetectedLanguage detected_languages = 3;
}
// A table representation similar to HTML table structure.
message Table {
// A row of table cells.
message TableRow {
// Cells that make up this row.
repeated TableCell cells = 1;
}
// A cell representation inside the table.
message TableCell {
// [Layout][google.cloud.documentai.v1.Document.Page.Layout] for [TableCell][google.cloud.documentai.v1.Document.Page.Table.TableCell].
Layout layout = 1;
// How many rows this cell spans.
int32 row_span = 2;
// How many columns this cell spans.
int32 col_span = 3;
// A list of detected languages together with confidence.
repeated DetectedLanguage detected_languages = 4;
}
// [Layout][google.cloud.documentai.v1.Document.Page.Layout] for [Table][google.cloud.documentai.v1.Document.Page.Table].
Layout layout = 1;
// Header rows of the table.
repeated TableRow header_rows = 2;
// Body rows of the table.
repeated TableRow body_rows = 3;
// A list of detected languages together with confidence.
repeated DetectedLanguage detected_languages = 4;
}
// A form field detected on the page.
message FormField {
// [Layout][google.cloud.documentai.v1.Document.Page.Layout] for the [FormField][google.cloud.documentai.v1.Document.Page.FormField] name. e.g. `Address`, `Email`,
// `Grand total`, `Phone number`, etc.
Layout field_name = 1;
// [Layout][google.cloud.documentai.v1.Document.Page.Layout] for the [FormField][google.cloud.documentai.v1.Document.Page.FormField] value.
Layout field_value = 2;
// A list of detected languages for name together with confidence.
repeated DetectedLanguage name_detected_languages = 3;
// A list of detected languages for value together with confidence.
repeated DetectedLanguage value_detected_languages = 4;
// If the value is non-textual, this field represents the type. Current
// valid values are:
// - blank (this indicates the field_value is normal text)
// - "unfilled_checkbox"
// - "filled_checkbox"
string value_type = 5;
}
// Detected language for a structural component.
message DetectedLanguage {
// The BCP-47 language code, such as "en-US" or "sr-Latn". For more
// information, see
// http://www.unicode.org/reports/tr35/#Unicode_locale_identifier.
string language_code = 1;
// Confidence of detected language. Range [0, 1].
float confidence = 2;
}
// 1-based index for current [Page][google.cloud.documentai.v1.Document.Page] in a parent [Document][google.cloud.documentai.v1.Document].
// Useful when a page is taken out of a [Document][google.cloud.documentai.v1.Document] for individual
// processing.
int32 page_number = 1;
// Rendered image for this page. This image is preprocessed to remove any
// skew, rotation, and distortions such that the annotation bounding boxes
// can be upright and axis-aligned.
Image image = 13;
// Transformation matrices that were applied to the original document image
// to produce [Page.image][google.cloud.documentai.v1.Document.Page.image].
repeated Matrix transforms = 14;
// Physical dimension of the page.
Dimension dimension = 2;
// [Layout][google.cloud.documentai.v1.Document.Page.Layout] for the page.
Layout layout = 3;
// A list of detected languages together with confidence.
repeated DetectedLanguage detected_languages = 4;
// A list of visually detected text blocks on the page.
// A block has a set of lines (collected into paragraphs) that have a common
// line-spacing and orientation.
repeated Block blocks = 5;
// A list of visually detected text paragraphs on the page.
// A collection of lines that a human would perceive as a paragraph.
repeated Paragraph paragraphs = 6;
// A list of visually detected text lines on the page.
// A collection of tokens that a human would perceive as a line.
repeated Line lines = 7;
// A list of visually detected tokens on the page.
repeated Token tokens = 8;
// A list of detected non-text visual elements e.g. checkbox,
// signature etc. on the page.
repeated VisualElement visual_elements = 9;
// A list of visually detected tables on the page.
repeated Table tables = 10;
// A list of visually detected form fields on the page.
repeated FormField form_fields = 11;
}
// A phrase in the text that is a known entity type, such as a person, an
// organization, or location.
message Entity {
// Parsed and normalized entity value.
message NormalizedValue {
// Structured entity value. Must match entity type defined in schema if
// known. If this field is present, the 'text' field is still populated.
oneof structured_value {
// Money value. See also:
// https://github.com/googleapis/googleapis/blob/master/google/type/money.proto
google.type.Money money_value = 2;
// Date value. Includes year, month, day. See also:
// https://github.com/googleapis/googleapis/blob/master/google/type/date.proto
google.type.Date date_value = 3;
// DateTime value. Includes date, time, and timezone. See also:
// https://github.com/googleapis/googleapis/blob/master/google/type/datetime.proto
google.type.DateTime datetime_value = 4;
// Postal address. See also:
// https://github.com/googleapis/googleapis/blob/master/google/type/postal_address.proto
google.type.PostalAddress address_value = 5;
// Boolean value. Can be used for entities with binary values, or for
// checkboxes.
bool boolean_value = 6;
}
// Required. Normalized entity value stored as a string. This field is populated for
// supported document type (e.g. Invoice). For some entity types, one of
// respective 'structured_value' fields may also be populated.
//
// - Money/Currency type (`money_value`) is in the ISO 4217 text format.
// - Date type (`date_value`) is in the ISO 8601 text format.
// - Datetime type (`datetime_value`) is in the ISO 8601 text format.
string text = 1 [(google.api.field_behavior) = REQUIRED];
}
// Optional. Provenance of the entity.
// Text anchor indexing into the [Document.text][google.cloud.documentai.v1.Document.text].
TextAnchor text_anchor = 1 [(google.api.field_behavior) = OPTIONAL];
// Entity type from a schema e.g. `Address`.
string type = 2;
// Optional. Text value in the document e.g. `1600 Amphitheatre Pkwy`.
string mention_text = 3 [(google.api.field_behavior) = OPTIONAL];
// Optional. Deprecated. Use `id` field instead.
string mention_id = 4 [(google.api.field_behavior) = OPTIONAL];
// Optional. Confidence of detected Schema entity. Range [0, 1].
float confidence = 5 [(google.api.field_behavior) = OPTIONAL];
// Optional. Represents the provenance of this entity wrt. the location on the
// page where it was found.
PageAnchor page_anchor = 6 [(google.api.field_behavior) = OPTIONAL];
// Optional. Canonical id. This will be a unique value in the entity list
// for this document.
string id = 7 [(google.api.field_behavior) = OPTIONAL];
// Optional. Normalized entity value. Absent if the extracted value could not be
// converted or the type (e.g. address) is not supported for certain
// parsers. This field is also only populated for certain supported document
// types.
NormalizedValue normalized_value = 9 [(google.api.field_behavior) = OPTIONAL];
// Optional. Entities can be nested to form a hierarchical data structure representing
// the content in the document.
repeated Entity properties = 10 [(google.api.field_behavior) = OPTIONAL];
// Optional. The history of this annotation.
Provenance provenance = 11 [(google.api.field_behavior) = OPTIONAL];
// Optional. Whether the entity will be redacted for de-identification purposes.
bool redacted = 12 [(google.api.field_behavior) = OPTIONAL];
}
// Relationship between [Entities][google.cloud.documentai.v1.Document.Entity].
message EntityRelation {
// Subject entity id.
string subject_id = 1;
// Object entity id.
string object_id = 2;
// Relationship description.
string relation = 3;
}
// Text reference indexing into the [Document.text][google.cloud.documentai.v1.Document.text].
message TextAnchor {
// A text segment in the [Document.text][google.cloud.documentai.v1.Document.text]. The indices may be out of bounds
// which indicate that the text extends into another document shard for
// large sharded documents. See [ShardInfo.text_offset][google.cloud.documentai.v1.Document.ShardInfo.text_offset]
message TextSegment {
// [TextSegment][google.cloud.documentai.v1.Document.TextAnchor.TextSegment] start UTF-8 char index in the [Document.text][google.cloud.documentai.v1.Document.text].
int64 start_index = 1;
// [TextSegment][google.cloud.documentai.v1.Document.TextAnchor.TextSegment] half open end UTF-8 char index in the
// [Document.text][google.cloud.documentai.v1.Document.text].
int64 end_index = 2;
}
// The text segments from the [Document.text][google.cloud.documentai.v1.Document.text].
repeated TextSegment text_segments = 1;
// Contains the content of the text span so that users do
// not have to look it up in the text_segments.
string content = 2;
}
// Referencing the visual context of the entity in the [Document.pages][google.cloud.documentai.v1.Document.pages].
// Page anchors can be cross-page, consist of multiple bounding polygons and
// optionally reference specific layout element types.
message PageAnchor {
// Represents a weak reference to a page element within a document.
message PageRef {
// The type of layout that is being referenced.
enum LayoutType {
// Layout Unspecified.
LAYOUT_TYPE_UNSPECIFIED = 0;
// References a [Page.blocks][google.cloud.documentai.v1.Document.Page.blocks] element.
BLOCK = 1;
// References a [Page.paragraphs][google.cloud.documentai.v1.Document.Page.paragraphs] element.
PARAGRAPH = 2;
// References a [Page.lines][google.cloud.documentai.v1.Document.Page.lines] element.
LINE = 3;
// References a [Page.tokens][google.cloud.documentai.v1.Document.Page.tokens] element.
TOKEN = 4;
// References a [Page.visual_elements][google.cloud.documentai.v1.Document.Page.visual_elements] element.
VISUAL_ELEMENT = 5;
// Refrrences a [Page.tables][google.cloud.documentai.v1.Document.Page.tables] element.
TABLE = 6;
// References a [Page.form_fields][google.cloud.documentai.v1.Document.Page.form_fields] element.
FORM_FIELD = 7;
}
// Required. Index into the [Document.pages][google.cloud.documentai.v1.Document.pages] element, for example using
// [Document.pages][page_refs.page] to locate the related page element.
int64 page = 1 [(google.api.field_behavior) = REQUIRED];
// Optional. The type of the layout element that is being referenced if any.
LayoutType layout_type = 2 [(google.api.field_behavior) = OPTIONAL];
// Optional. Deprecated. Use [PageRef.bounding_poly][google.cloud.documentai.v1.Document.PageAnchor.PageRef.bounding_poly] instead.
string layout_id = 3 [
deprecated = true,
(google.api.field_behavior) = OPTIONAL
];
// Optional. Identifies the bounding polygon of a layout element on the page.
BoundingPoly bounding_poly = 4 [(google.api.field_behavior) = OPTIONAL];
// Optional. Confidence of detected page element, if applicable. Range [0, 1].
float confidence = 5 [(google.api.field_behavior) = OPTIONAL];
}
// One or more references to visual page elements
repeated PageRef page_refs = 1;
}
// Structure to identify provenance relationships between annotations in
// different revisions.
message Provenance {
// Structure for referencing parent provenances. When an element replaces
// one of more other elements parent references identify the elements that
// are replaced.
message Parent {
// The index of the [Document.revisions] identifying the parent revision.
int32 revision = 1;
// The id of the parent provenance.
int32 id = 2;
}
// If a processor or agent does an explicit operation on existing elements.
enum OperationType {
// Operation type unspecified.
OPERATION_TYPE_UNSPECIFIED = 0;
// Add an element. Implicit if no `parents` are set for the provenance.
ADD = 1;
// The element is removed. No `parents` should be set.
REMOVE = 2;
// Explicitly replaces the element(s) identified by `parents`.
REPLACE = 3;
// Element is requested for human review.
EVAL_REQUESTED = 4;
// Element is reviewed and approved at human review, confidence will be
// set to 1.0.
EVAL_APPROVED = 5;
// Element is skipped in the validation process.
EVAL_SKIPPED = 6;
}
// The index of the revision that produced this element.
int32 revision = 1;
// The Id of this operation. Needs to be unique within the scope of the
// revision.
int32 id = 2;
// References to the original elements that are replaced.
repeated Parent parents = 3;
// The type of provenance operation.
OperationType type = 4;
}
// Contains past or forward revisions of this document.
message Revision {
// Human Review information of the document.
message HumanReview {
// Human review state. e.g. `requested`, `succeeded`, `rejected`.
string state = 1;
// A message providing more details about the current state of processing.
// For example, the rejection reason when the state is `rejected`.
string state_message = 2;
}
// Who/what made the change
oneof source {
// If the change was made by a person specify the name or id of that
// person.
string agent = 4;
// If the annotation was made by processor identify the processor by its
// resource name.
string processor = 5;
}
// Id of the revision. Unique within the context of the document.
string id = 1;
// The revisions that this revision is based on. This can include one or
// more parent (when documents are merged.) This field represents the
// index into the `revisions` field.
repeated int32 parent = 2;
// The time that the revision was created.
google.protobuf.Timestamp create_time = 3;
// Human Review information of this revision.
HumanReview human_review = 6;
}
// This message is used for text changes aka. OCR corrections.
message TextChange {
// Provenance of the correction.
// Text anchor indexing into the [Document.text][google.cloud.documentai.v1.Document.text]. There can only be a
// single `TextAnchor.text_segments` element. If the start and
// end index of the text segment are the same, the text change is inserted
// before that index.
TextAnchor text_anchor = 1;
// The text that replaces the text identified in the `text_anchor`.
string changed_text = 2;
// The history of this annotation.
repeated Provenance provenance = 3;
}
// Original source document from the user.
oneof source {
// Optional. Currently supports Google Cloud Storage URI of the form
// `gs://bucket_name/object_name`. Object versioning is not supported.
// See [Google Cloud Storage Request
// URIs](https://cloud.google.com/storage/docs/reference-uris) for more
// info.
string uri = 1 [(google.api.field_behavior) = OPTIONAL];
// Optional. Inline document content, represented as a stream of bytes.
// Note: As with all `bytes` fields, protobuffers use a pure binary
// representation, whereas JSON representations use base64.
bytes content = 2 [(google.api.field_behavior) = OPTIONAL];
}
// An IANA published MIME type (also referred to as media type). For more
// information, see
// https://www.iana.org/assignments/media-types/media-types.xhtml.
string mime_type = 3;
// Optional. UTF-8 encoded text in reading order from the document.
string text = 4 [(google.api.field_behavior) = OPTIONAL];
// Styles for the [Document.text][google.cloud.documentai.v1.Document.text].
repeated Style text_styles = 5;
// Visual page layout for the [Document][google.cloud.documentai.v1.Document].
repeated Page pages = 6;
// A list of entities detected on [Document.text][google.cloud.documentai.v1.Document.text]. For document shards,
// entities in this list may cross shard boundaries.
repeated Entity entities = 7;
// Relationship among [Document.entities][google.cloud.documentai.v1.Document.entities].
repeated EntityRelation entity_relations = 8;
// A list of text corrections made to [Document.text]. This is usually
// used for annotating corrections to OCR mistakes. Text changes for a given
// revision may not overlap with each other.
repeated TextChange text_changes = 14;
// Information about the sharding if this document is sharded part of a larger
// document. If the document is not sharded, this message is not specified.
ShardInfo shard_info = 9;
// Any error that occurred while processing this document.
google.rpc.Status error = 10;
// Revision history of this document.
repeated Revision revisions = 13;
}