Html metadata pdf download

This feature is only present in the Pro version, so you will need to purchase that version before following the below steps. After purchasing the software, download and install it on your computer. Run it as an Administrator and open the PDF file from which you want to remove the metadata. Click on the "Remove Hidden Information" option which will be present under the Hidden Information section.

It will open another pane on the left side of the screen. In this new pane, make sure to check the data that you want to remove. This is often best suited for users who occasionally change information inside a video or image file. Locate the intended digital file. Mac and Windows differ quite a bit, especially in this regard.

Mac users typically look to editing programs to change metadata, but with image files it is possible manually. Locate the image file you wish to edit and right-click it 3. From the new window, locate the details you wish to change and do so.

Make sure that you have an editing system that fits your specific needs. Chances are it will come in handy more than you think. Casey is a content management and branding expert who enjoys taking complex subjects and making them easy to understand for readers. Where are most people opening your emails? We break down the most popular email clients and show you how to use that knowledge to improve your emails.

Adobe InDesign is a prominent design tool that maximizes your success in projects. Learn the most useful features of this software here. Workflow automation enhances company productivity through structured systems that require minimal user engagement. Learn more about it here. Revamp your information with these 7 unique metadata editors.

This article delivers seven fantastic examples, explaining each option in detail. It is useful to make a distinction between the vocabulary of an HTML document—the elements and attributes, and their meanings—and the syntax in which it is written.

HTML has a defined set of elements and attributes which can be used in a document; each designed for a specific purpose with their own meaning. Consider this set of elements to be analogous to the list of words in a dictionary. This includes elements for headings, paragraphs, lists, tables, links, form controls and many other features.

This is the vocabulary of HTML. Similarly, just as natural languages have grammatical rules for how different words can be used, HTML has rules for where and how each element and attribute can be used. The basic structure of elements in an HTML document is a tree structure.

Most elements have at most one parent element, except for the root element , and may have any number of child elements. This structure needs to be reflected in the syntax used to write the document. While these are similar, each is optimised for different needs and authoring habits.

The former is more lenient in its design and handling requirements, and has a number of convenient shorthands for authors to use. The latter is based on XML and has much stricter syntactic requirements, designed to discourage the proliferation of syntactic errors. Although it is inspired by its SGML origins, in practice, it really only shares minor syntactic similarities. This features a range of shorthand syntaxes, designed to make hand coding more convenient, such as allowing the omission of some optional tags and attribute values.

Authors are free to choose whether or not they wish to take advantage of these shorthand features based upon their own personal preferences.

While this too is inspired by SGML, this syntax requires documents to be well-formed, which some people prefer because of its stricter error handling, forcing authors to maintain cleaner markup. Due to the similarities of both the HTML and XHTML syntaxes, it is possible to mark up documents using a common subset of the syntax that is the same in both, while avoiding the syntactic features that are unique to each.

This type of document is said to use polyglot markup, often simply referred to as a polyglot document, because it simultaneously conforms to both syntaxes and may be treated as either. There are a number of issues involved with creating such documents and authors wishing to do so should familiarise themselves with the similarities and differences between HTML and XHTML.

There are a number of basic components make up the syntax of HTML, that are used throughout any document. Note: The term "legacy-compat" refers to compatibility with legacy producers only. This quoted string, however, may also be quoted with single quotes, rather than double quotes. The highlighted fragments below illustrate which parts are case insensitive in HTML. Although, be advised that DTDs have a number of limitations compared with other alternative schema languages and validation techniques.

HTML5 conformance checkers are required to issue a warning if one is present. The highlighted fragments indicate case insensitivity in the HTML syntax.

In addition to those, the following public and system identifiers in the table below may be substituted accordingly. This section needs revising and may be moved to an external document and simply referred to. However, due to legacy constraints, it has gained another very important purpose: triggering no-quirks mode in browsers. HTML5 defines three modes: quirks mode , limited quirks mode and no quirks mode , of which only the latter is considered conforming to use.

The reason for this is due to backwards compatibility. The important thing to understand is that there are some differences in the way documents are visually rendered in each of the modes; and to ensure the most standards compliant rendering, it is important to ensure no-quirks mode is used. Each is represented syntactically by a tag.

While the types have some similarities to each other, they are distinguished by their syntactic requirements for their content models and the types of tags that may be used. All elements are identified by their tag name and are marked up using either start tags and end tags or self-closing tags. A start tag marks the beginning of an element, while an end tag marks the end.

Start tags are delimited using angle brackets with the tag name and any attributes in between. End tags are delimited by angle brackets with a slash before the tag name. A Self-closing tag is a special form of start tag with a slash immediately before the closing right angle bracket. These indicate that the element is to be closed immediately, and has no content. Where this syntax is permitted and used, the end tag must be omitted. In HTML, the use of this syntax is restricted to void elements and foreign elements.

If it is used for other elements, it is treated as a start tag. But note that it is only conforming for elements with content models that permit them to be empty. In HTML, tag names are case insensitive. It is conventional to use their canonical case, but this is not required. For example, they could be written in all uppercase or mixed case, depending on your own preferences.

Refer to the definition of each element if in doubt. Some authors choose to include a space before the slash in the self-closing tag. This practice is based upon a convention that originated within the compatibility guidelines in XHTML 1. However, adherence to this convention is unnecessary. The permitted syntax of each element and its content model varies based on the type of element.

The term empty element is used to describe an element that contains no content. Elements of any type can be empty, depending on their content model. Depending on the type, these are represented either by a start tag that is immediately closed, either implicitly or by the presence of an end tag , or by using the self-closing tag syntax.

The term void elements is used to designate elements that must be empty. These requirements only apply to the HTML syntax. In XHTML, all such elements are treated as normal elements , but must be marked up as empty elements. These elements are forbidden from containing any content at all.

In HTML, these elements have a start tag only. The self-closing tag syntax may be used. The end tag must be omitted because the element is automatically closed by the parser.

Such elements include, among others, br , hr , link and meta. The term raw text elements refers to elements within which the content is treated as raw text instead of markup. These require a start tag and an end tag. Neither the self-closing tag syntax, nor optional tags are supported. These elements can only contain raw text. This means that other content like comments , character references and other elements cannot be represented in the HTML syntax.

That is, the markup for such constructs is treated as text instead of markup. All occurrences of special characters do not need to be escaped as character references , as they otherwise would within normal elements.

There is, however, one additional restriction that the text cannot contain a string that looks like the element's end tag. In the previous example, an HTML conformance checker would report the error as relating to the second end tag , believing that the first is in fact the end tag. Care must be taken to ensure such strings do not occur within the script. In XHTML, because such elements are treated as normal elements , markup like comments, character references and other elements can be represented.

It is therefore necessary to escape all special characters using either character references or by enclosing the content within a CDATA section. However, by taking advantage of the scripting language's comment syntax, those strings can be commented so that they are ignored by the script in HTML, but still processed as markup in XHTML. The term RCDATA elements refers to elements within which character references are supported, but all other content is treated as raw text instead of markup.

These elements can only contain text or character references. This means that only character references are treated as markup, whereas all other content like comments and other elements cannot be represented in the HTML syntax. That is, the markup for such constructs is treated as text.

Occurrences of special characters may, but generally do not need to be escaped as character references , as they otherwise would within normal elements. But this is subject to the additional restriction that the text cannot include an ambiguous ampersand. That is, an ampersand followed a sequence of characters that looks like a named character reference, but which is not valid.

Another additional restriction that the text cannot contain a string that looks like the element's end tag. In XHTML, because such elements are treated as normal elements , markup like comments and other elements can also be represented. The self-closing tag syntax may be used, where the element's content model permits. Optional tags are not supported.

Normal Elements refers to all other HTML elements that are not categorised in any of the other types. These have a start tag and an end tag. These elements do not support the self-closing tag syntax. Certain elements have optional tags , meaning that one or both tags may be omitted in specific circumstances where the presence of the tag will be implied by surrounding markup. Consult the element definitions to see which tags may be omitted.

Some additional restrictions apply on a per-element basis to some specific elements. Consult the element definitions for details. Elements may have attributes that are used to specify additional information about them.

Some attributes are defined globally and can be used on any HTML element, while others are defined for specific elements only. Every attribute must have an attribute name that is used to identify it. Every attribute also has an associated attribute value , which, depending on the attribute's definition, may represent one of several different types.

The permitted syntax for each attribute depends on the given value. Attributes are placed within a start tag and are separated from the tag name and from each other by whitespace. They must not be specified within an end tag. In HTML, attribute names are case insensitive.

It is, however, recommended that authors use the lowercase letters in the ranges a—z and 0—9. Attribute values may contain text and character references , subject to the restriction that the text cannot contain an ambiguous ampersand , and to any additional restrictions imposed by the syntax being used.

There are four slightly different syntaxes that may be used for attributes in HTML: empty, unquoted, single-quoted and double-quoted. All four syntaxes may be used in the HTML syntax, depending on what is needed for each specific attribute. However, in the XHTML syntax, attribute values must always be quoted using either single or double quotes.

An empty attribute is one where the value has been omitted. This is a syntactic shorthand for specifying the attribute with an empty value, and is commonly used for boolean attributes. However, due to legacy constraints, this has been changed in HTML5 to reflect the way implementations really work. Note: The previous examples are semantically equivalent to specifying the attribute with the value "disabled" , but are not exactly the same.

An unquoted attribute value is one where the value is supplied, but is not surrounded by quotation marks. To represent those characters in an attribute value, they either need to be escaped using character references, or you need to use either the single- or double-quoted attribute values.

In the previous example, each attribute is separated from the last by a space. The slash at the end, which despite not being separated from the last value by any space characters, is not considered part of the attribute's value.

Instead, the the slash indicates the use of the self-closing tag syntax. An double-quoted attribute value is one where the supplied value is surrounded by double quotation marks ". The attribute value must delimited by double-quote characters " before and after the value, and must not contain any double-quote characters or an ambiguous ampersands in between.

All other text and character references are permitted. An single-quoted attribute value is one where the supplied value is surrounded by single quotation marks '.

The attribute value must delimited by single-quote characters ' before and after the value, and must not contain any single-quote characters or an ambiguous ampersands in between. Discuss numeric and named character reference syntax. May link to the list of entity references in a separate document, rather than trying to list them all in here.

Overview of Unicode, character repertoires, encodings, etc. The important thing to understand is that there are valid reasons to choose both, and that authors are encouraged to make an informed decision. Polyglot documents are useful to create for situations where a document is intended to be served as either HTML or XHTML, depending on the support in particular browsers, or when it is not known at the time of creation, which MIME type the document will ultimately be served as.

In order to successfully create and maintain polyglot documents, authors need to be familiar with both the similarities and differences between the two syntaxes. This includes not only syntactic differences, but also differences in the way stylesheets, and scripts are handled, and the way in which character encodings are detected. This section will provide the details about each of these similarities and differences, and provide guidelines on the creation of polyglot documents.

Base this on the HTML vs. XHTML article. Each element in HTML falls into zero or more categories that group elements with similar characteristics together. The following categories are used in this guide:. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:. Example Specify a value for the download attribute, which will be the new filename of the downloaded file "w3logo. Report Error. Your message has been sent to W3Schools.