redbook.io

Tasks

Avoid using deprecated HTML tags.
Implement the viewport meta tag.
Use "H" tags.

SEO

URL

Domain : www.redbook.io/

Character length : 15

Title

Readings in Database Systems, 5th Edition

Keywords (meta keywords)

Good! The website does not use “meta keywords”.

Open Graph Protocol

Error! The website does not use the OG (Open Graph) protocol.

Dublin Core

Dublin Core is not used

Underscores in the URLs

Good! No underscore (_) found in the URLs.

Search engine friendly URLs

Good! The website uses SEO friendly URLs.

Checking the robots.txt file

The robots.txt file is missing!

Social

Social Engagement

Linkedin160

Facebook Share0

Facebook Comments0

Content

Doctype

Missing doctype element

Encoding

Error! The character encoding setting is missing!

Language

Error! No language localization is found.

Title

Readings in Database Systems, 5th Edition

Character length : 41

Good! The title’s length is between 10 and 70 characters.

Text / HTML ratio

Ratio : 27%

Good! The text / code ratio is between 25 and 70 percent.

Headings

H1	H2	H3	H4	H5	H6
0	0	0	0	0	0

No "H" tags found

Heading structure in the source code

Word cloud

html16
pdf15
introduced10
michael6
stonebraker6
bailis5
peter5
hellerstein4
take3
readings3
data3
joe3
book3
systems3
analytics2
red2
edition2
database2
target2
moving2
biased2

Keyword matrix

word	title	descriptions	heading
html
pdf
introduced
michael
stonebraker
bailis

Two Word cloud

introduced by michael3
bailis html3
joe hellerstein2
stonebraker html2

Three Word cloud

joe hellerstein html2
peter bailis html2
readings in database systems2

404 Page

The website has a 404 error page.

Flash content

Good! The website does not have any flash contents.

Frame

Good! The website does not use iFrame solutions.

Images

We found 1 images on this web page.

Good! Every image has an alternative text attributes set on this website.

Technologies

Deprecated HTML elements

Good! No deprecated HTML tags are detected.

Redirection (www / not www)

Good! The web address is accessible only in one version. The version without www is redirected to the version with www.

Deprecated HTML elements

Good! No deprecated HTML tags are detected.

Printability

Suggestion! Unfortunately, no printer-friendly CSS found.

Meta Tag (viewport tag, mobile devices)

Error! The meta tag named viewport is missing.

Speed test

Server response time

The server response time is fast enough.

Table layout

Good! No nested tables found.

Number of HTTP resources

Number of source domains

Render blocking resources

The elements below are blocking the “above the fold” rendering.
List of render blocking css files

http://fonts.googleapis.com/css?family=Raleway:700,600,500
https://fonts.googleapis.com/css?family=Open+Sans:700,600,500,400,300...
http://www.redbook.io/css/redbook.css

Speed test – Javascript

Javascript

Good! Just a few javascript files are detected on the website.

File size of all javascript files combined

34.84KB

Javascript minifying

Great! The Javascript files are minified.

Speed test – CSS

CSS

Good! Just a few CSS files are used on this website.

http://www.redbook.io/css/redbook.css

File size of all css files combined

19.13KB

CSS minifying

You can save 1.3KB (21% compression) on the analysed URL by minifying the CSS files.

By minifying http://www.redbook.io/css/redbook.css you can save 1.3KB (21% compression rate)

Speed test – Compression

Uncompressed size of the of the HTML

5.90KB

Gzip compression

Error! By using Gzip you can save 4.6KB (77% compression) on your site.

By compressing http://www.redbook.io/css/redbook.css you can save 4.6KB (77% compression rate)
By compressing http://www.redbook.io you can save 3.7KB (67% compression rate)

Speed test – Browser cache

Number of static resources (image, JS, CSS)

Browser cache

The browser cache is not set correctly for all elements.

URL	Duration
http://www.redbook.io/css/redbook.css	Expiry time is not specified
http://www.google-analytics.com/analytics.js	2 hours

Speed test – Images

File size of all images combined

1.44KB

Image optimisation

All images are optimized.

Links

We found a total of 36 different links.
Internal links: 30
External links: 6

External links:

Link text (anchor)	Link strength
Peter Bailis
Joseph M. Hellerstein
Michael Stonebraker
http://creativecommons.org/licenses/by-nc-nd/4.0
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License
@pbailis

Internal links:

Link text (anchor)	Link strength
Readings in Database Systems, 5th Edition
Preface
HTML
Background introduced by Michael Stonebraker
HTML
Traditional RDBMS Systems introduced by Michael Stonebraker
HTML
Techniques Everyone Should Know introduced by Peter Bailis
HTML
New DBMS Architectures introduced by Michael Stonebraker
HTML
Large-Scale Dataflow Engines introduced by Peter Bailis
HTML
Weak Isolation and Distribution introduced by Peter Bailis
HTML
Query Optimization introduced by Joe Hellerstein
HTML
Interactive Analytics introduced by Joe Hellerstein
HTML
Languages introduced by Joe Hellerstein
HTML
Web Data introduced by Peter Bailis
HTML
A Biased Take on a Moving Target: Complex Analytics by Michael Stonebraker
HTML
A Biased Take on a Moving Target: Data Integration by Michael Stonebraker
HTML
HTML
HTML
HTML

Website security

52.218.128.127

External hidden links

Good! No hidden external links found

Looking for eval()

Good! No eval(bas64_decode()) scripts are found

Checking for XSS vulnerability

No XSS vulnerability found

Email encryption

Warning! The website contains at least one unencrypted email address.

Sites on same ip

pmiefworkshop.org

meridiangroupsells.com

cleanslatetechnologies.com

Icons

Favicon

Good! The website uses favicon.

Typos

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SEO report of redbook.io